Change the motherboard to an asrock z68 extreme 3 gen 3.
I think the mobo he has is fine. Not sure about ASRock still. They seem to just be cheaper Asus mobos.
Yeah change that PSU and get 600 or 650W. Price wise they are very similar if not the same. Another thing is that you don't want 500W PSU work at 90%...rather get 650W that would work at 70%
look at this one after $10off and rebate it is only $60http://www.newegg.ca/Product/Product.aspx?Item=N82E16817371044
This much is true. Its never a bad thing to over power your system and honestly, CM PSUs are pretty bad. We switched to all Corsair at work and haven't had nearly as many problems as we did with the CM PSUs we used to use.
You can get a 600W Corsair CX, not the best of theirs but still much better than CM. I would honestly suggest a Corsair TX series at the minimum, the professional series. I have a 850X TX and love it, well wish it was the HX for modular but i can live with it.
Antec though has left a bad taste in my mouth with their current cases. The 902 still uses bad HDD setups and the cable management sucks. Their PSUs as well have not been that great recently. Not sure why but maybe they switched OEMs. I know Corsair still uses mainly Seasonic.