+1 have both. very different but great cars. M5 is comfort king but also can be mental with so much power on the rear axle. M3 is like a missle and handles so much more rawly. M5 does well to hide its weight but on the edge it appears.
Neil J. ///McRae -- Alive and Kicking -- neil at DOMINO.ORG
M3 DCT Alpine White -- M5 DCT Monte Carlo Blue