Mat for Rega P10


I decided to start this discussion to hear different experiences from Rega RP10 and P10 users. I know Rega does not suggest replacing their own, supplied with turntable, mat as doing so can degrade the sound but I have to say that I am loyal opposition to that concept, looking for replacement ASAP.

I know Framer recommended the Stein Music The Perfect Interface Carbon mat but $625 for mat is quite steep I think. Even the cheapest one is $250 and I do not consider It a bargain. 

Does anybody here use either of those two mats and can share some insight as to why they are so expensive and if they really make that much of a difference?

arturgorniak
For now it’s Washi.you never mentioned your recommendation lewm. Please enlighten me.
I think I said I’ve never owned a Rega and therefore don’t feel qualified to give advice. 
Next Tuesday I'll be getting my Teac mat and a Herbie's Way Excellent II mat for my P10.  I'm interested in reducing static but also I'm interested in finding the mat that sounds the best to my ears.  I'll compare them to my leather mat that I like better than the stock felt.