HAAHAA.  Im looking into the M3's as we speak.  The Volvo is nice, but id like to eventully grab hold of an M.  My uncle has built up several (more than 5 but less than 10) and they were all beautiful cars.  His last one was a Dinan... Vortec SC @ 13-17psi (dont remember exactly), alky injection, fully built engine, and made a moddest 590whp.  It was really something.  
I highly recommend the M's, but i couldnt tell you the first thing about them at the moment.