I would also highly recommend going for a custom desktop PC. I got my first custom desktop PC from a special NZ company who lets you customize anyone of the premade systems they advertise, they make recommendations, troubleshoot it for you, and give you a 12 month of even longer warranty. My custom desktop PC comes with an 18 month warranty. Some hardware pieces like RAM may have longer warranties and the company I got it from (1stwavetechnologies) is able to help with claiming warranties for those too. A Samsung 850 Evo 1TB SSD comes with a 5 year warranty from Samsung.
Have a look around depending on the country you live in. Some companies will assemble it and troubleshoot it for you too! Rather than many companies who just ship you the individual parts and expect you to put them together yourself! and then you need to make sure it will all work!
All companies, HP, DELL, TOSHIBA, SONY, MICROSOFT, etc, offer premade systems. But those premade laptops and desktops have severe hardware upgrade restrictions. And those companies only offer 12 month warranty as standard. Sure you could purchase extended warranties, but that costs extra. Also with premade systems, for the price you pay, you get pretty crap hardware, like only dual core processors or Pentium processors or AMD quad core processors with ahmm low clock speeds, and mobile versions of AMD and GTX graphics cards (IF they even bother to put a dedicated GPU in the laptop). Many laptops may just rock of Intel HD Graphics and have no dedicated GPU.
In New Zealand, all retailers for the price of NZ$2500-$3000, are only selling laptops with i5 6200U and i7 6500 which are only dual core processors. And only AMD R7 M360 or GTX 965M. HP was all over the moon when they decided to put an i7-6700HQ in a laptop. Dual core CPU's have been around for over 10 years on laptops, and can't believe companies are slow in putting in quad core i5/i7's in much more of their laptop lineups and calling that the norm. I paid NZ$2500 for my custom desktop, and it has a longer warranty than just 12 months. And it has an i7-6700k which thrashes the i7-6700HQ in terms of performance. It also has an SSD, DDR4 RAM (can't believe companies are still manufacturing new laptops with just DDR3 RAM), and an AMD R9 390 (desktop medium to high end GPU which has a higher bandwidth, bigger bus, and double the vRAM of a GTX 970).
I would suggest to all to look into custom desktop. I feel you get better worth in terms of performance, options, and money, with this route. And if you aren't a computer technician, no worries. Some companies will even assemble it and troubleshoot it and provide options for you, then deliver. This is what 1stwavetechnologies does who is a NZ company. I'm sure there'll be some Australian/UK/US companies who do the same.
