List all the parts your keeping for a suitability check.
Like, if you have a PATA/IDE DVD/CD burner - not all motherboards have those connections any more.
The only part I would be saving with be my GTX 460 and my PSU if I do not need a new one. I would be starting from ground up with getting a new case, mobo, HD(using my other sata HD for video capture only), ram, CPU, and a new CD/DVD bunner.
You might want to jump on over to the Systems > New Build section of the THG forums where they handle about a couple dozen of these requests per day. And they are more in tune with current prices, sales and combo deals.