While mindlessly meandering at My Page, I ran across a post I made about this time last year concerning the terrific system you were enjoying. I also noted you upgraded your P3 with a TT-PSU. Since then, I've off'ed the Pro-Ject for a P5 with same. I agree: WOW! I've been enjoying more vinyl the past 8 months than the previous 10 years combined. Check out an AT-150MLX for your Rega when it's time for a new cart: it sounds killer with the turntable!
My system is now the P5 setup, ARC PH3, Consonance Sig 100/6550 integrated, Cambridge 740c, and MG1.6s...:)