Originally Posted by M3 Esq.
Hankook RS-3 is a good choice as well. Plenty grippy at the track and good on the street. And they are reasonably priced. I'd probably stick with the stock sizes unless you don't mind your speedo being off a bit.
Unfortunately RS3's are not available in any 19" sizes that fit the front of the M3.
'13 SSII M3 Coupe - KW Clubsport 3-way, Akrapovic Evolution, ESS Tune, StopTech Trophy, IND Euro Front Bumper and Gloss Black Mirror Covers, TMS Studs/Lugs, BMW Performance Carbon Fiber Spoiler/Interior Trim/Center Console, BMW Edition Grills/Gills, BMWPedals Extended DCT Paddles, Advan TC3 18x9.5 & 18x10.5 - Hankook RS3 (Track), HRE R40 - 18x10 & 18x11 - Michelin PSS (Street)