Thanks everyone for the comments. Honestly I can't wait to spend money on wheels and tires... I hate the way the runflats behave and perform even in a daily driver context, and I think our wheels are way too heavy. I think I'll wait a couple more events before getting some track only wheels/tires, though.
2009 M3 Sedan DCT - Alpine White / Anthracite Speed Cloth
Mods: Fabspeed X-Pipe, Black grills and gills.
Tracks driven (in any car): Nürburgring Nordschleife (05/2011), Eagles Canyon Raceway, MotorSport Ranch Cresson, COTA Austin