I'll chime in on the mat issue. I tried the Boston Audio Mat 1, a cork mat, a copper mat from TT weights, and no mat. In the end, believe it or not, I prefered the cheap felt mat that came with the Nott TT's. My (subjective) impression is that the more expensive mats added some detail and clarity at the expense of some liquidity. I'm sure this is very system dependent. Overall, I spent about $400 trying different things out and ended up back where I started. Live and learn.