It's funny I came across this post and read what I originally posted cause last night I traded in my M3 for a 2011 ISF. While I do miss and will always miss the M, I'm very happy and impressed with the ISF. Very comfy, seats are awesome, and it is def fast..... Love the interior and nav. I like it better then the I drive. Plus last night while driving home I saw 24.4 mpg. The only weird thing is that modding the ISF is minimal. There are no tunes for the ISF, I can only look at CAI, exhaust, headers, and that's about it.... The M had more modding possibilities....
BMC filter, OEM Exh Mod, ESS Direct Flash tune, flat black kidney grills, color painted front reflectors, LUX Angel eyes, -2012 SVT Raptor 4 dr -09 E90 M3