I went through a tire sizing dilema with these same wheel sizes. See my signature for what I ended up running with. I love PSS but I wish 295/35 or 305/35 was available for the 11" wheel. Other options include Hankook RS3's (265 / 285 (nothing larger than 285 available), Nitto NT05 (275/35, 295/35) or Michelin PS2's (275 or 265 front, 295/35 rear).
'13 SSII M3 Coupe - KW Clubsport 3-way, Akrapovic Evolution, ESS Tune, HRE R43, StopTech Trophy, IND Euro Front Bumper, TMS Studs/Lugs, BMW Performance Spoiler, BMWPedals Extended DCT Paddles, BMW Edition Grills/Gills