Turntable with stable speed.

this is not so simple.

some (older) direct drives were constantly monitoring and adjusting the platter speed thus creating a pitch instability all the time. these models came even from companies like micro seiki. not to mention that some of the excellent measurements of the DD's have to do with some trickery in the measurement method.

there are issues with the string tension in the belt driven TT's as well. the speed is maintained constant thanks to the usually high platter weight. Quality motors make the difference here too.

Hysteresis motors are very stable (empire troubador was among the steadiest tables ever made) but no longer in production. pity

Idlers faced issued in this sector too, as the commonly used eddy current brake was not that precise and heavily influenced by several factors.

so the answer is: go for a good table, without excluding technologies. if you would like to provide a price range suggestions could be more precise

I build TT's and own (or owned) just about every possible technology.

A decent TT will measure wow/flutter of less than 0.08%, the smaller the better. 0.06 weighted is very good and below that excellent.

I am afraid that truly excellent tables do not exist at this price (thats for new including tonearm).

I would look out for 2nd hand and if it is ok with you i would check those vintage denon DD's, cause they tend to cost less than other famous DD's as the technics sp10 mk2-3.

some excellent tables (early 80's japanese products) can be found at this price range, check the vintage knob site for micro's, kyocera, kenwoods top model.

2nd hand tables (not vintage ones) might be found at y price range complete with tonearm. SME and kuzma are 2 of my favs

Im afraid Omsed is right. Optical speed control is a nice marketing theme but fails to give truly constant speed. It was an error of micro seiki too, continuous speed corrections created exactly the opposite effect of keeping the speed constant. and it is very audible..

as for the high torque, we could discuss the benefits for the low freq reproduction but it surely has nothing to do with pitch stability. unless it is coupled to high friction bearings, and this is not the case. (which would eventually create rumble issues but that's another story)