Rega P5 Upgrade:TTPSU,Platter Or Subplatter?


I have read about Groovetracer acrylic platters and subplatter Reference being an upgrade to the stock ones in the P5. I've also read about better counterweights, one of them being Michell Tecnoweight to improve on the stock stainless steel counterweight on the P5.

Just out of curiousity, which upgrade below will yield the highest degree of sonic impact in chronological order?

1) Rega TT PSU
2) Groovetracer subplatter Reference
3) Groovetracer acrylic platter
4) Michell Tecnoweight counterweight
5) Clamp

Anybody tried an aftermarket acrylic platter on the P5?

Any opinions would be appreciated.
ryder
Yes, I had the TTPSU and a Rega Exact2 cartidge on the arm. Cash is king during times of lean. I admit I got a superb deal.
Personally, the TT-PSU can't overcome the deficiency of the plastic subplatter. If you have any Rega deck below the P7, get a machines subplatter first. The TT-PSU won't correct pitch instability.
I have been considering these mods myself, to my P-5. I currently have a TTPSU and Exact cart. Thoughts on putting Aurios 1.2 s under the feet, which I did yesterday? Will have to talk to my local dealer re a P7 trade up.
I have begun upgrading my P5, as listed above and have the TT PSU, the Groovetracer counter weight and sub Platter and the improvement is incredible. It is quieter, more detailed and I am able to use my Decca record brush, without stopping the platter from spinning with even the slightest pressure. The question I have, is anyone familiar with the Funk Firm Achroplat Acrylic platter for the P5. I would rather have the Groovetracer, but it is unavailable, with no availability date in sight. The Acroplat is in the same price range, so that is not an issue, but I have not been able to find anything from anyone with experience using it with the P5. Any information will be appreciated.
I responded in another thread regarding the Achroplat but I should mention that I will have acrylic platters available in 3-4 weeks.