Re: $250-$300 Build
the green would be my choice, its a better psu, its an 80 bronze, the basiq is just 80%.
A cable is 4 bucks, or steal one from your old power supply... But as I said both are good, the green is much better with 2 more cables, and better efficiency.
Foldie = i7 950@ 4.0Ghz Gigabyte x58a-ud3r EVGA 970 SC Corsair H100 Corsair hx520 3x2gb OCZ Gold Corsair 650D
Woohoo = L5639 @3.1Ghz EVGA SR-2 gtx 260-216 Hyper 212+ Corsair 1050hx 6x2gb Corsair XMS3 Blackhawk Ulra
Alienware 18 - SLI 770M 4700mq 16Gig