I just built a system. I tried rosewill for the case and power supply due to the price, but I'm surprised that its pretty good quality. The case is so heavily painted that even the edges are painted and rounded instead of sharp. Thats something I immediately noticed, having built or been inside 10,000+ PC's over the years.
I'm also very impressed with having 6 fans and the system is nearly quiet.
I wanted to go with micro center, but not living near one they don't allow you to ship they're CPU deals.
I tossed around i5 or i7 and went with i5 due to getting to upgrade the video card which is where gaming processing happens anyway.