Looks good considering you're including a monitor. I would recommend a Samsung F1 HDD if you can get one, they are meant to be the best. The keyboard probably isn't worth the price, there is no need for a wireless one (unless you specifically want that one). Case looks nice, the price of that monitor worries me, but I guess it's gonna do it's job at least.

The only other thing is that I really would recommend Vista at this moment in time. You can get it for only a little bit more and it isn't nearly as bad as most people say. A year ago, i'd say stick with XP yes, but now everything is made for vista, everything is compatable, and the performance difference is next to negligible. Though you might want another 1-2GB of RAM if you do get Vista, but RAM is so cheap anyway.

Other than that it looks good! Only place I can really see you saving cash on would be the keyboard.