Optiplex or Precision?

Our team is going through the exercise of purchasing new systems and we're weighing the benefits of the higher-performance Dell Precision desktops and the more cost-effective Optiplex systems. It's almost a 2-for-1 deal on Optiplex vs. Precision, but given some of the work that's going to come our way using things like WPF, I'm leaning heavily toward the heftier systems. Of course, this means that some of our later employees will be left using Etch-a-Sketches instead of computers...