Like the others above - I am a Walker owner, so my comments should be taken in that context. The Walker is the least fussy playback system I have ever owned. It holds its VTA, speed, VTF settings rock steady. Music does get altered in presentation by minute adjustments to VTA. While the VTA adjustment is not on-the-fly, it is quick and easy. The air bearing arm is no fuss and the compressor pump is as good as it gets, very stable and reliable. Best of all, when you purchase the Walker Proscenium Black Diamond, Lloyd and Fred come and set it up. They don't leave until it's right and they are satisfied. In the year I have owned mine, no adjustments have been neccessary, not even to the speed. All I have changed is the VTA, to suit different LP thicknesses.
The above is my personal choice, but your other choices are world class turntables as well...
The above is my personal choice, but your other choices are world class turntables as well...