P3RS, P6, Marantz TT or RP8

Just a note, the Marantz is made for them by ClearAudio. The RP8 is going to be much better than the P3RS or P6 so pic the best one you can afford in the Rega line. All should be great tables from reviews, but they do have different ideology, Rega being a light weight and Marantz being a more mass loaded design, both good just a different approach. You do not want to add weight to the Rega tables.  I don’t think you could go wrong with any of them just double-check your carts compliance for the arms used.

the clearaudio has an 808 tonearm

Given your cartridge choice, I say the Marantz is the best option.