That bundle seems ok. You're not going to be lacking in performance as it is the highest end consumer CPU without going the route of X99 chipset mobo and costs escalate. I don't recognise the cooler, but the mobo + CPU would be close to the asking price anyway. Overclock is pretty easy on those and more a balance of cooling and performance, so don't pay extra for an overclock which doesn't seem to be the case here. On that note, if you like the look of another mobo more go for it. You will also need new ram as the ones from old system wont be compatible. Most people seem to be going for 16GB in builds these days as it doesn't cost much more than 8GB.
Given the old system was X79 it was probably high-end for its time so you should be able to reuse the rest of the components. As far as Windows is concerned this will look like a new system. I've not tried it, but you may need a manual reactivation with MS if you have retail Windows, and they may not transfer if it was OEM licence. So you may or may not need a fresh copy.
If you give details of the rest of the system we can double check if there is anything obvious.