Platter for Rega RP3 turntable


I've just begun making tweaks on my Rega RP3 turntable. I ordered a new subplatter and improved belt.
in addition, would an acrylic platter make a big difference?
I've looked at the ads for the Groove Tracker and the SRM/Tech platters.  Is there a significant enough difference in the two to warrant the big price difference?
Are there others that anyone likes better?
i would appreciate any feedback.

128x128Ag insider logo xs@2xrvpiano
Post removed 
A lot has happened since my last post. 
1. I received the Achromat platter, and unfortunately didn't like it. Although it was very detailed, it seemed to cut the overtones from the classical music I listen to and didn't let the music "breathe."  My Herbies mat was better in that respect.
2. I ordered and received the TT PSU but I haven't heard it yet because:
3. One of my mono block amplifiers (NuForce) stopped working and unfortunately the manufacturer is out of business.  After much Googling, I found an ex NuForce technician who is going to repair it and upgrade both amps. That's the good news.  The bad news is I'm without any sound and am unlikely to have any for a total of two weeks.
And this after I ordered several tweaks that I can't hear!
Audiophile Hell!!!
I have a Iron Audio acrylic platter. (approx. 1 inch thick) in like new condition if you are interested. To my ears it made a nice improvement on my Rega. Don't use it because I now have  a Well Tempered Labs Amadeus Mk.II.
I'm a little bit wary of acrylic after my Achromat experience.  I think I'll stick with Herbies for the time being.