I like the factory rims w/out lowering. The car looks too high with aftermarket for some reason. It's probably just me. I prefer the OZ black ultraleggaras, or the RX-8 wheels if I were to buy wheels.
My dealer told me not to use the rubber mats with the MS3 because the clutch and gas pedal were getting stuck in the rubber. That could be one of those stories that mechanics seem to have a endless supply of though.