I have a similar system to this. I went with the 920 i7 though, and it's a great value... I have the Gigabyte EX58-UD4P motherboard which I think is a bit better than the EVGA unit.
Just something to keep in mind: When I upgraded, my existing power supply wouldn't allow the system to boot. I decided on the Antec 750 watt EarthWatts PSU, and it fixed my problem. The machine is awesome... no instability issues whatsoever.
As the OP already mentioned, do NOT go with the Green drives. They don't offer consistent performance. I went with the Seagate 1.5tb Barracuda drive, and my friend with the Green drives is envious.
