Hi
I woned a pretty "modded" Rega P9 with the 2000 arm, now I own the Kuzma Stabi s12 with Ref. 313 arm (12") ....it is way ahead of the Rega for me. It has been used with a Hana SL and ways excellent and now an Airtight PC-7...and is sublime.
The P10 is an excellent table but only if you want to set up and forget...and use Rega cartridges....as has been pointed out shims are an issue....but you can get it set up correctly. The Kuzma for me is just way more "table" on every aspect and I really enjoy Franck Kuzma's whole business model