Hi nfshp253!
To be honest GTX680 in SLI configuration is not optimal in terms
of price to performance ratio. I would suggest you go with either
GTX670 in SLI, or even GTX660 TI in 3-way SLI.
SSD for RAID is a bit too expensive for your budget. But if you
must, use something like OCZ Vector, or another model that supports
TRIM in RAID 0 configuration.
PSU, go for something like Seasonic, or another OEM
manufacturer. Corsair, Cooler Master buy their PSUs from Seasonic
and the likes, and relabel them and sell them at a slightly higher
price.
Check out http://www.techtowkay.com and talk to our customer
service reps if you need help with recommendation. We can help you
build the rig, and provide 3 year next business day on site
service.