I can vouch for the Athlon II X4 640. It's what I'm running now!
It is outdated though, and I'd go with an i3-2100. The i3-2105 if you plan on not having a descrete graphics card.
We don't plan on ever doing anything that would need a GPU. The most the system will ever do, in terms of video, would be Blu-ray playback and the mobo seems sufficient for that.
The primary use of the computer is to process sales (credit cards) and keep books, so we were going more bang-for-the-buck than power/performance. According to www.cpubenchmark.net, the X4 640 gives more CPU/$. Are there other benchmark sites that people prefer?
Typically we have QB 2010 Retail open plus the CC processing tool, IE, FF, Safari and Chrome with a normal combined total of 20 windows to maintain connections to the various sales portals for Directv, Clear, our suppliers, google docs/cal/gmail, etc.
I would like to order tuesday night so that everything gets here by friday so I can build/install when our assistant is at the store with me on Saturday.
Is there anything about this set that I should be worried about? Any problems connecting an old-school dvd burner (eide/ata cable)? It looks like it will work, but if it won't then I'll order a sata replacement now.