Ulisse Maxi works fine. Both through Sensormatic or PelcoD protocol. That's very precise. For instance the minimum pan speed I computed is about 0.05 degree per second. But it may be even more accurate (I'm not sure I was at full zoom)
Pelco domes (Spectra IV) are working fine too. But there you cannot change the optical components.
For the protocols, I know that PelcoD, Sensormatic, Bosch are supporting Absolute Ptz. Sensormatic and PelcoD also support requesting current device position. Which doesn't seem to be the case from what I see in Bosch SDK.