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.
Aug 2013: 2009 M3 Sedan DCT - Alpine White / Anthracite Speed Cloth
Mods: AA Filter, Fabspeed X-Pipe, Black grills and gills.
Sold in 2011: 2007 335i Coupe MT - Space Gray Metallic / Coral Red
Tracks driven: Nürburgring Nordschleife (05/2011), Eagles Canyon Raceway, MotorSport Ranch