Rega P5 Upgrade:TTPSU,Platter Or Subplatter?

Get a P-7 No Joke!
I owned the P-5 with all the upgrades you listed above
and they made a very good improvement to the P-5.
The Acrylic platter however was brighter then the stock
glass platter and this my not be good in some systems.

When I went to the P-7 the improvements were even greater
then the modified P-5. If you can do it, sell your P-5 and
go straight to the P-7.

If you don't want to do this then get the power supply
sub platter and clamp first. Get the tone arm weight and
acrylic top platter later.

Ryder: Don't under estimate the Ceramic Platters sound
improvement over the P-5's glass platter. The P-7 also
has a superb bearing housing and sub platter.

You can change the subplatter on the P-5, but not the
bearing housing. This is the part the sub platter fits
in to. The bearing housing on the P-5 is crap by
comparison to the bearing housing in the P-7 and P-9.

The P-7 and P-9 have the dual belt drive system. A big
improvement over the P-5 which can have speed problems
over time due to the single belt system it uses.

I had both my modified P-5 and a P-7 in my system at the
same time with the same cartridge and while the P-5
was very good, it was no match for the P-7.