Also should have said, the Enc module itself will not be an issue, the spindle on my Chiron has a max rpm of 3800 and I have an encoder output of 32,768 pulses per rev, so that is just over 2MHz.
With a 2500 line encoder at 10,000 rpm that would be 1.6MHz.
I think the Enc module can handle at least 3MHz.
Hood