I have both P1 and a Pro-ject Debut in the fleet and the latter is better built and better sounding out of the box.
My Rega's bearing took a long time to break in (couple of hundred hours) for pitch stability. The Pro-ject only took about 50 hours. The OM5 cartridge takes about 15-30 hours to break in.
The Rega's platter is uneven but ours have been flawless sound wise and looks nice.
My big boy table is a P5 and I also own a Rega amp, pre amp and tuner. Rega makes great sounding equipment with so so build quality. Once set up right they last a long time. 30 year old Rega Planars are everywhere.
Talk to the distributor.

