watch the case. it's a full tower. full towers are very large. a mid tower is usually plenty big enough even for people that have a lot of stuff to put in there.
I'm getting Windows, the hard drive and the optical drive for free. And I know the case is big but I'm planning to upgrade in the future so I just wanted to have plenty of room to work with.
Ya I think I might go with that cosair PSU that someone else posted. For the GPU I'm planning to just get that one for now, and then when I have a little bit more spending money I'll buy a second one and run them together.