I've been waiting to see some thorough testing of the 335is on a track. I have an E92 335i with a DINAN stage 1 tune, so I've been curious as to how my car stacks up. Having been to the track now on a few occasions, I know that the numbers posted on any given day are subject to any number of variables. That said, I'm happy to see that my mild stage 1 tune can out perform all the 335is numbers I've seen posted (in a straight line, at least).
I think the 335is has a place, and I think it's a beautiful car. Knowing what I know, I would much rather own an M3 if it came down to a decision between the two. Just my opinion.
'07 E92 BMW 335i