I have the OCZ modstream 520, and before i got it i was a little hesitant becuase with my system everyone was saying i should get a PC power and cooling, but i am OCZ faithful and i am very happy with it, the rails are solid and i have no instability running two 6800 ultras in SLI with an FX-55, and two raptors, everything seems a-okay youll be very happy with it.
As for the LED, to cut the wire you have to take the case off and be very careful with the transistors(drain them with a rubber handled screwdriver after letting it sit for six hours without it plugged in) and then cut the wire. I replaced mine with a white LED, becuase i wanted my Blue CCFL coming from a different part of the case, and i only wanted a light overlay, not a huge bright glowing disco inferno.
As for the case, they are very great, the price is a little high, but once you get it you'll have no regrets, i have the PC-75 silver with case window, its very strudy and extremely well built.