Looks like I might have a new place to post whore... j/k

This is my system:
Opteron 148 250x11 2.75Ghz
ASUS A8N-SLI Premium
Patriot 2x 512MB DDR400 @ 500Mhz (with some low timings, but im not sure what anymore)
I also have a 6800GS 256MB.
I want to add more RAM, but Patriot doesn't sell my XBLK Samsung chips anymore.
I found some on ebay, but they wanted too much IMO.
I want to upgrade to an 8800GTS but I want some input as to whether it will work well with the rest of my system.
I've been looking at a whole new system as well.
I'll post some details about it later.
Thanks in advance,
-FUZiON