01 M3 sounded beautiful. 6 months later the seats were cracking a lil and interior pieces were squeaking/creeking/rattling. Mechanically great though. BMW are more "drivers cars" than MBZ though, even AMG.
The Alpina 7-Series are beautiful, but there's more prestige with the MB 550 or AMG S63. Hell, i believe id take an AMG E45 over a B7. BMW vs Audi would be antougher choice to make. Audi interiors are even nicer than MBs. Audi maintence is worse though IME. $150 oilnchanges and whatnot