I haven't set a budget

but I want it to be something that isn't too expensive. Games I play right now on the PC is guild wars, and not too often at that, other than that I don't game much, but now I want something to could game if I wanted to. I play most of my games on the PS3 right now and use my PC for entertainment, right now my X1650 running 720p, ok but with hiccups and 1080p is just well, forget it!
I will need a new keyboard and mouse (I like illuminated keys), I have Windows 7 coming to me, I need a mobo (asus preferably), proc, ram.
I know this doesn't help much, lol