Thanks for the advice
#1. I am 99% sure 1080p, just because I know he doesn't have any monitor/T.V. that can support 2k or 4k.
#2. Pretty much everything. He will mainly play a lot of strategy/Builders and RPG's but he will play everything with me, Action, FPS, ETC.
#3. Sadly yes, ATX is final because liek i said he is picky and i mentioned the micro and he said, "I plan on building a case and that thing would just look dinky"