all i switxh on your build is the power supply. spend the extra for a good name brand bronze unit like seasonic or cosair. also toss in a ssd boot drive the vertex 4 128g drive on sale for 80.00 with code today.
That's not a great deal for a low end case. It has USB 3, which is nice, but it won't have much in the way of cable management. The Rosewill Challenger has a few more features and is often in a combo deal with the PSU.
That would depend. It's enough for any single video card. The one you chose would not be enough for two larger cards.... so you have to be more specific about a future GPU or you need to buy a lot more PSU up front.