looking to upgrade rega planar 2

Agree with Lloydc that the weak point of any lower-end Rega is the arm wiring and counterweight. Absolutely concur that you should do them first.

OTOH I don't think that footers or running the motor from an iso transformer are invariably a waste of money. If your TT is not on a stable base, especially a wall shelf, or if your electrical supply is poor quality, they may be useful.

I think that Lloydc is quite right, though, in pointing to a turntable upgrade as the most desirable way to spend money after the arm.

That glass platter is not the weakest link in a Planar 2. I would upgrade the arm, instead; improving the wiring (Incognito) and the counterweight (Origin live)both produce audible improvements. When you're ready to improve on the tt itself, it's time to buy a better tt. at that point, you can still use the upgraded arm. upgrades to the platter, motor, footers, that plastic pulley under the platter, is money down the drain.