Thanks, that narrowed my search.
Anyone have a favorite source for barebones systems? I just need mb/cpu/mem and a new case.
I'm pretty fond of J&N Computer Systems -
http://www.jncs.com (Note: the website was redone recently and not all links were functional last time I checked so I recommend using their toll-free number) Not the cheapest place around but honest. The sales folks do not work on commission so they don't try to pressure you into something more expensive. They stock from individual components to complete systems. Give them a call, tell them what you're looking for and see what they recommend. May tell you what to avoid as well as recommending something for you. And if you aren't in New York, no sales tax; shipping is a bit more than I wish but you can't have everything.
Once you've talked to them, do some online research. Tomshardware has already been mentioned. Let me recommend anandtech and sharkysextreme as a couple of other places.