Telephoto zoom with AFs and tripod mount?

Hi Folks,

Is there such a thing as a mid/long range telephoto zoom for DX, that has a tripod foot, and internal focus motor?
Preferably pretty high quality as well.

The Sigma 50-150 has the motor, but I seem to recall no tripod foot.
The Tokina 50-135 has the tripod mount, but I think its screw drive only.

Something light like the 50-200 DX nikkor would probably work balance wise if the camera itself was on a tripod, but while its an ok lens and can be fairly sharp in the middle, I'd ideally like really high res over all the frame if required, so the two f2.8 lenses mentioned above will probably fit the bill (when stopped down a little), but when mounted on the plastic D5100, I'd like them to be able to focus, and have a tripod mount nearer the centre of gravity!

Does such a lens exist ???