275/35 with et22 will fit with KW Clubsports. Not sure if KWV3's have less clearance. There is only a few millimeters of clearance with those sizes in Michelin Super Sports and Clubsports.
As far as the rear... 285/35 is probably the best option. Unfortunately very few tires are available in 295/35 sizing and an et20 is probably too aggressive for 295's anyway.
'04 E46 M3 - Jet Black - Sold
'08 E90 M3 - Alpine White - Sold
'13 E92 M3 - Silverstone II - Sold
'13 E92 M3 - Alpine White - Ohlins TTX, Fall-Line Suspension Arms/Bushings, AP Racing BBK, OE GTS Aero, Cobra Seats, Akrapovic GT4, GMG 4-point, BBS E88