I got the arm that comes with the P8 (RB880) as soon as it came out and subsequently got the rest of the table. The only reservation I would have is if you have to install on a very bouncy floor and can't put it on a wall shelf or some other type of isolation. It is very light and IMHO sounds like nothing, which is what you want from a table. I don't tinker and knowing I have to ability to adjust VTA on the fly would annoy me.
Admittedly, I don't know anything about the Technics other than it is direct drive which I would think has some kind of componentry that could cause some kind of electrical or magnetic interference with the cartridge.
I don't know about the Technics arm, but I would be the Rega RB880 would far outperform it. It is the only Rega table that comes with it.

