Taking all this on board.... and now I am deciding on a Televue 101...
quad-apo should be decent I assume
Tracking - pretty much immaculate, even in 20 min subs (no trailing evident). guess I got lucky with a PERFECT NEQ6 and a darned good autoguider (and went against everyone's recommendation for refresh rate LOL). Zenith can be a little tiny "jump" - not trail, but you can see the guider over-compensated. But I think a LOT of mounts have zenith complications.
So, narrowing this dow - TV 101 quadruplet, Vixen FL102 doublet or a Northgroup 127 Triplet.