I use a Stabi S12 table, and Ref 313 arm....on my table I find the German Pathe mat (rubber&cork) to be excellent. I am running an Airtight PC-7 thru my Modwright Ph 9.0.
I sometime prefer for some lp's no mat but somehow in my system this works best often with the mat.I have used many other mats in the past including the Boston Mat 1 (carbon fiber) and Funk Firm 3mm , I believe it depends upon your system, room and musical tastes......agree Thom is amazing and fun speak to on all things analog.