Well Tempered Classic or Technics SP10Mk2

I replaced my Well-Temprered Reference Table after 12 years of believing it was irreplaceable. The replacement was a used Technics SL-1000 MK II. That's the SP-10 in obsidian base with the EPA-100 MK II tonearm. There was no comparison. The Technics surpassed the WT in every regard.
Don't hesitate to make the change. It's like moving from a hang glider to a jet.

Macrojack and CPK's direct experience is invaluable. What cartridges did both of you use on the Sp-10?

I used a Denon DL 103.

Audio Technica AT33ptg

bob - A couple of other comments - my WT was stethoscope quiet but theSP-10 had a much blacker background. The other change that I welcomed was the sense of precision and refinement that the Technics provided over the well-designed but decidedly Rube Goldberg inspired WT. The EPA-100 is a genuine contender for best arm ever made.
At it's age, the Technics you are considering will certainly benefit from R&R but they seem to work forever in the home environment since they were designed for round the clock abuse for 10 years in radio stations. I would look at the R&R as an upgrade path. Talk about the plinth is overstated. Yes, it is possible to improve upon the obsidian base but it is by no means necessary. All of this comes down to your mental state. How much do you want to obsess vs. how much are you willing to spend?
After all, have you changed your monofilament regularly? How about the silicone bath? All tables have moving parts and they all wear. They all need maintenance and they all benefit from rehab. Pick your poison. I, having experienced both would prefer the SP-10.