Jelco SA-750D or Rega RB250

Jelco SA-750D.  Period.  I can't think of any Stock Rega that is in the same league.  Haven't heard ALL the arms using Rega parts, but EVERY Rega-based arm has the same sonic signature. 

Too right bp.
Why anyone buys a TT that they know will need many bucks to "modify" is beyond me .

Another vote for the Jelco. It is so much more versatile. Interesting comments about the collar. I have no problem with my Sumiko Premier MMT made by Jelco; but I did see it with an Audioquest PT-9 version of the 250 and my Linn Bask LVX. I bought This:
https://www.mains-cables-r-us.co.uk/tone-arms-headshells/618-custom-mounting-collar-for-jelco-tone-a...
for the PT-9; which I no longer have, and it won't fit the Linn. If anyone is interested, PM me.

2channel8, did the custom collar work well?   I saw it but decided against it because it still has one setscrew only.  I guess it could have less clearance to make it work.  I got one made with 2 setscrews 45 degree apart and with a little less clearance and it worked out great.  

@rotarius I got the Ammonite collar and it is well built and works well. It only needs one set-screw as the internal shape of the cylinder grips the shaft on 2 other points. I did not notice any sonic change after fitting. VTA adjustments feel more precise.