Also could consider Falken F452's in 275/305 fitments as well as Toyo T1R's. Someone here just got the latter in 315's in the rear (dammit, can't remember which member

). Very anxious to hear his thoughts on those.
As far as rubbing, I think the M6 guys have less of a problem with that and 305's b/c of the wider rear wheel well. Spacers will just make that problem worse.