Need Help with Overhaul

It's been a few years since I've built a system and I've been so busy that I've lost track of some of the technology. I'm upgrading my old system (practically building an entirely new system) and I need to know if all of these components should play nice together. I've done a fair amount of research and I think I'm good to go. I'll be recycling my HDD, optical drives and my case. I use my system for everything from photo editing to watching TV but my main concern is gaming performance (prepping for Crysis). I'm running a 22" WS monitor at 1680x1050 (hence the 640MB VGA memory). I used to be into overclocking but I don't think I'll be OCing this system. I'm open to better choices but my main concern is compatibility. Right now, I'm just under $1000 and don't want to go any higher. Here are the upgrades:

MSI K9N SLI Platinum AM2 NVIDIA nForce 570 SLI MCP ATX AMD Motherboard

Foxconn FV-N99SMBD2-ONOC GeForce 8800 GTS 640MB 320-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Card

Thermaltake TR2 RX W0134RU ATX12V Ver2.2 550W Power Supply (2 - 12V rails at 16 and 17A)

AMD Athlon 64 X2 6000+ Windsor 3.0GHz Socket AM2 Processor Model ADX6000CZBOX

(2 each for total of 4GB) mushkin 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit
Desktop Memory - Retail

Microsoft Windows Vista 32-Bit Home Premium for System Builders Single Pack DVD - OEM

Thanks in advance for your feedback!