Just bought mine out of warranty! There might be some aftermarket option I could pursue but IMO it's not worth it. So I guess you could say I'm keeping it.
My internet perusal and couple of conversations led me to believe (probably erroneously) that the current gen M3's are some of BMW's most reliable cars. Hardly definitive
I got scared away from many other options... SMG failure etc. and valve adjustments on the last M3's, Z4M... RMS IMS and crappy tiptronic on the porsches... Vanos and basically everything on the M5... seems like every car has problems if you dig deep enough, but not so much the e92 M3s.