Asus P5Q-E
Akasa Ultra Quiet 500W Paxpower Active PFC ATX2.2 Power Supply - Black Nickel
OCZ StealthXStream 500w Silent ATX2 Power Supply
OCZ StealthXStream 600w Silent SLI Ready ATX2 Power Supply
FSP Sparkle Epsilon 80PLUS 700W Power Supply
All about the same price as the one in your list.
I would consider Phenom II 720 and a 790 mobo instead of e8400. Same price, better performance IMO.
Performance isn't opinion, it's benchmarked
Do you really need the G15 keyboard? Up to you entirely, but I can happily game with my LX710