@syr1990 - My Rega Planar II originally had a glass platter - it was tough to get a mat that worked really well.
Finally settled on a 20 SRM/TECH Acrylic Platter
DELUXE ACRYLIC PLATTER FOR REGA AND REGA CLONES | eBay
Installed it and never looked back.
I think what helps the performance of this platter is the "Peripheral Rubber Band" surround - which helps add mass and prevents the platter from "ringing"
This provided the performance boost I was looking for
- more artculate
- improved details and clarity
- tighter bass
- less glare
- improved sibilance
A mat is not required with this platter.
Since changing to the Acrylic platter I have upgraded the plinth, arm and cartridge and each time this platter simply provided more and more details.
After this experience, I would not consider any turntable that did not have an acrylic platter
Hope that helps Steve