Get a 120Gb SSD for windows and key apps, get a WD drive, don't get those fans, better ones are from Corsair. That H81 mobo is t the highest quality, maybe get a H97 from ASRock instead. Everything else looks great though
I don't think you should, maybe upgrade to a 80+ Gold one or replace with an EVGA 600B 80+ Bronze PSU. More reliable, and I would t trust the CX series to keep an OC stable haha
No, Adata is a good and reputable memory brand. In fact, Linus said it in some of his videos before. Not saying is just because he said it, but they get positive reviews.
K70. I have a K65 which is like the same but w/o the ten keys. I love it, best purchase I have ever made! I have the MX Reds. Software is amazing too, as a bonus