Well, I just booted into Incarna and each client added took a bite out of performance. With all five going the computer was almost unresponsive (the clients were unresponsive.)

Apparently it was chewing up 91%+ of my physical RAM.

Just so you can benchmark i7 930, 6GB RAM, SSD, NVIDIA 285 1G

I think I could squeak 2 clients with Incarna running, but 5 is a no-go.