BMW really screwed thierselves on the 135i. WIth a flash, downpipes and cat back it is putting down much better numbers than the m3. I think it is one of the best cars out this year.
I bet the M3 will still out handle the 135i with a tune as the M3 has the better suspension.
You want the best car that came out this year, IMHO it's the Corvette ZR1. It is eating up the competition.
http://www.autocar.co.uk/VideosWallpapers/Videos.aspx?AR=242044&CT=V
Not a bad car at all.