Upgrades for Rega P3. Worth it?


Good afternoon, all. Have been considering various upgrades to my Rega P3 and wondering if anyone could share their own experiences with this. In particular, looking for real advice on whether certain upgrades were worthwhile and/or had an observable benefit to sound quality to people who've done them.

I currently have a P3 with an Ortofon 2M Blue cartridge, Clearaudio counterweight, and Pro-ject Tube Box SE II phono stage. Potential upgrades I have considered:
Rega TT PSU power supply,
Groovetracer (or other) subplatter,
Groovetracer (or other) acrylic platter (vs. stock glass),
Phono cartridge replacement

Are any of these really worth doing?
nichomoff
Well upgradingto a better Rega TT is another line of upgrade.
I own a Rega P5 with PSu.. I have a Benz Glider on it.
With a multi thousand phono box.

I would consider the subplatter first after the PSU.
Once adding in platter etc, upgrading the table makes as much sense.
Though if you buy the Rega upgrades.. they WILL be able to be swapped to a P5 if you wanted to go for a better arm like on P5.

Your cart and phono box are level. an upgrade in either one should also be followed with an upgrade in the other.
Have you considered the Rega White Belt? Maybe it was because the old belt was wearing out, but for me the white belt was a major improvement. A few weeks later I installed the Groovetracer reference subplatter and the noice floor dropped.

I have the P3-24 with the power supply and exact cart.
I had a P5, since sold. But I had the Groovetracer reference
subplatter and can echo Jetrexpro..the noise floor dropped.I
didn't care much for the Groovetracer acrylic platter, but
the new delrin platter they make was superb. A marked
improvement over the acrylic and stock glass. If you're a tinkerer may I suggest the dual pulley made by Michael Lim. Of all the upgrades I made it was the most dramatic. Noise floor lowered further, wider sound stage , tighter bass. As for the white belt, I found one on sale and got it to have as a spare. I didn't notice any change whatsoever when I tried it.