And I did not need a machine as big as that any more, so I looked around and decided to get a server-workstation from Dell. T7600. I already took it apart and it looks well built. The components are mostly brand name. There is room to work. It has a 4-core Xeon processor and another socket for another processor if I need it (I probably won't).

I recently pulled the trigger on a Dell Precision T3600 (6-core Xeon, 32GB RAM, solid-state drive, NVidia CUDA graphics) and I've been really pleased with it. It was a refurbished unit, but even so, I've had no problems with it and a 4yr, next business day warranty was available at a reasonable price. Similar units from HP or Lenovo would have been substantially more expensive.

In 2010, I purchased a 15" Dell Studio for my better half and we've had no issues with it at all...It's been rock-solid reliable and has exceeded my expectations.