CPU - Fine, but you may want to look at the AMD six-cores (1055T and 1090T) if you're doing any work that can take advantage of it.
Motherboard - Do you absolutely need an SLI board? Only Nvidia chipsets are dead as a family and I wouldn't expect BIOS updates. That is, if you want to upgrade to Bulldozer CPUs next year.
Graphics - WAIT UNTIL OCTOBER FOR SOUTHERN ISLANDS. But if you can't, then GTX 460 SLI is fine, though saying that causes me physical pain as an AMD fan.
RAM - You seriously don't need 8GB. It's a complete waste. Go for 4GB.







