A friend of mine traded in his B7 RS4 for an e90 M3, both 6MT. He's enjoying it immensely so far and hasn't missed the Quattro yet, despite the rainy/slushy weather. He's running on Conti DWS ExtremeContact on the M3 but hasn't tried it in actual snow yet. He's said the better balance and grip offered is immediately noticed and prefers the engine characteristics and intake/exhaust note as well. Quite smitten. I really like the look of the LeMans Blue with Tan interior on the e90 as well.