The current server: I built it almost exactly to the specs you outlined in your sticky thread. 16GB of RAM. It's working great, and I'm careful to keep it that way.
I built it so that we could have ultimate flexibility in terms of upgrade/replacement path. We recently had a Dell workstation go bad on us - turned out to be the motherboard. We essentially had to toss out a nice (XPS model) case and power supply because of the proprietary nature of the motherboard.
