Okay guys and girls, thanks everyone for the great advice, I have narrowed it down to a component list, again, I am more than happy for people to chime in with feedback. I am focusing on trying to build a system which is both up to date and will serve me for a good few years, but at the same time can be enhanced further down the track if necessary.
I have planned the build into phases so that I can wait as long as possible to get the graphics card and possibly SSD as it seems those two areas are seeming to see the largest price drops.
Please keep in mind that simplicity has been considered as I am by no means an expert, so I have tried to find components which are both reliable and easy to fit. Again, opinions and feedback welcomed. All prices are GBP delivered.
Phase 0 - where I am now...
Case - I have purchased a Corsair 200R which was £52.99, several reasons, I want a fairly plain looking mid tower, nothing too flashy, would rather save money here and put it towards components. It looks as if it is getting good reviews for a lower priced unit.
PSU - Have gone for a Corsair RM 650x. £80.66. Several reasons here. Very good reviews, cables which are all removable from both ends, a good selection of quality cables included. 650watts is plenty of power and I think even in the future it will meet my needs. The brand seems well respected and the reviews are favourable. Very energy efficient and the PC may end up running on low level tasks as it may act as a server in the future.
Phase 1 - what I plan to get next...
Asus Z170 Deluxe ATX LGA1151 Motherboard. £230.27
Several reasons. It supports the chip I want, has a great range of features, includes Bluetooth and WLAN as well as NFC all built in. This is where simplicity is built in as many of the features I would want are simply included on the board. I realise that this may be a slightly more expensive way of adding these features but my logic is that it is all designed to work well with the board and I am less likely to run into irritating driver or compatibility issues down the line. For me simplicity in use is important. I very nearly went to a MAC but I felt a better quality PC would maybe offer more.
CPU Cooling - Cryorig H7 Heatsink £26.49 I don't intend on over locking at this point and the motherboard allows for plenty of additional fans which can all be automatically profiled and adjusted depending on use. I guess down the line I could switch out this if needed?
Phase 2 -
CPU Intel i7 6700k 4.0GHz processor - seems to get fantastic reviews and I hope will offer me a sweet spot between paying too much for technology that is new to market and getting something decent enough that it will be good for 5 years plus without needing upgrading. I guess it could be over clocked later if I needed more performance. £272 for unlocked. Hoping this may drop but with the new processors not out till the end of the year I'm not holding out too much hope.
I intend to stick in a spare 120GB HDD which I have already just to use in the interim and I have a couple of 1GB RAMs which I can add just to get the thing off the ground.
The HDMI out will be linked to my existing AV receiver and then to the Plasma screen.
Fans - going to head to quantity over quality here, the motherboard will support at least 5 120mm fans all running at separate speeds so hopefully I can pick some up cheap and cheerful. Anything that is quiet and fairly effective should be sufficient. I don't tend to use the computer really intensively for long periods of time, I tend to use it for a few hours and then take a break which makes a big difference in the whole rig cooling back down in those little gaps of idleness. The case is supplied with two so I will see how it fairs and add more as needed.
Phase 3
SSD - I am looking out for decent prices on Samsung SSD which is extremely well rated and seems to be very reliable. I know Apple use these drives in all the MACs. So far I am looking at using approx 512GB to install Windows and my mainly used programs and of course Planet Coaster. So far price is £179 for 512GB with a read/write speed of 6GB a second which will hopefully really boost my startup time and overall speed.
RAM - I intend to use two DDRM4 8GB to give me a total of 16GB again I can hang on for prices and offers. At the moment 16GB is coming in at £70. I may go for a slightly cheaper make here as I am less worried about reliability as I would imagine prices per GB will continue to fall as we march into the future. Anyone have any strong opinions on this?
Phase 4
GPU - Waiting for a possible price drop on Nvidia GeForce GTX 970. I'm thinking this will be the point at which price vs performance is optimal for me. As the Alpha goes on and optimisation and water, AI is refined I would expect people to have more of an idea of how the game performs in real world conditions. At present this card is around £280 in the UK so even a 10-15% saving on this price would reduce the cost a fair bit.
Large HDD - Again I am happy to wait here as SSD seems to drop in price I would expect conventional HDD to drop consistently as well. I am looking to add a large 6TB drive to act as a media storage and backup for other devices, such as iPADs, phones, kid's devices etc. I was thinking of getting a NAS so that it could be possible to access away from home without leaving the PC running all the time. Thoughts anyone? I can wait to add this once I research a little more, I have a few existing external drives which are taking the strain for my antique laptop at the moment.
Bluray - DVD/RW will eventually throw one of these on as my existing DVD player is on the blink and only works reliably when propped up on empty cases, for £42 it would be rude not to!
Hoping to achieve this for around £1200 total. This obviously depends a bit on what I can find in the way of SSD and how much the graphics cards potentially drop...
What does everyone think? Have I gone wildly wrong anywhere?
Thanks again for the wonderful advice and information so far, has really given me lots to think about.