At 11k miles my rear OE Pirrellis are toast and need replacing. Tirerack (and anywhere else I've looked) wants an arm and a leg for the Pirellis so I'm planning to commit the mortal sin of mismatching the front/rears. In the interest of mitigating issues associated with grip differences I'm looking for a tire with similar grip to the Pirellis. Bridgestone Potenza S04s and BFG Sport Comp 2s seem like obvious choices and the price is right, but there are other options from Goodyear, Continental, etc. Any recommendations from anyone else who has gone down this patch? Thanks.