5000 to 8000 RPM mills are pretty common. Once you break the 8,000RPM barrier price starts to go up rapidly. You can pretty much do anything with 8,000RPM mill though. I was looking hard at the Hass SMINIMILL with 10,000RPM spindall, 15HP motor, 2.5 second tool changer and 1200IPM rapids.
Still half kicking myself for not buying it when I could. It is only $40,000! Pluse a few G's for extras. Most full size trucks and SUV's are in that price range. I would rather have the mill!
But anyway going a little to off topic.