Quite frankly, you need to make some changes and look at what you are doing. You have a Chassis bundled with a power supply unit and you have also selected another power supply on top of that. The Rosewill is not a wise choice as they almost always fail in a short period of time and sometimes taking out other components in your system. Quality power supply manufacturers are Antec, Corsair, Seasonic, and the more expensive OCZ's.
Choosing nVIDIA right now isn't a wise choice either. ATi has monopolized the market with greater performance while still being an equal or less than price over any nVIDIA counterpart. This means choosing an SLI board probably isn't the best choice either. If you really prefer nVIDIA I suggest you wait until their new line of cards have launched which should be in a few months.
@BohleyK: I've never seen OCZ units more expensive than any of those...
Agree with everything Bohley said. My suggestions:
Case: I've never been impressed with the RAIDMAX cases. I highly recommend the Antec 300, 300 Illusion, or 900. Or the HAF 922.
Mobo: Don't bother getting an AM3/AM2+ board. It forces you to use the worse/dying DDR2 memory. I highly recommend the Asus M4A79XTD EVO. It's probably a little pricier, but it's a very high quality, high value board.
RAM: You'll need DDR3 with that. I recommend getting at least 1333 mhz CAS Latency 7 (timings 7-7-7-x) sticks. Stick with G.Skill for the value.
HDD: Try to find a Samsung Spinpoint F3 500 GB. It should be about the same price, but better performance. If you can't find one, the Seagate's a good choice.
Optical: You can probably find a cheaper SATA DVD burner.
GPU: HD 5770. Enough said. You could wait for Fermi to come out in a few months, but the early indications show it runs very hot (they teamed with Thermaltake to make special cases for multiple card solutions). To me, that means they had to massive overclock the cards in the factory to even compete with the 5xxx series. It's really not worth it unless use lots of PhysX, which seems to be disappearing from newer games.
CPU Cooler: You only need a CPU cooler if you're going to overclock. If you decide to, the Coolermaster Hyper 212 is one of the best and fairly priced.