The C32/55 is a luxury mile muncher, a very quick mile muncher but it is designed to gobble the miles (or kilometres) on the Autobahns at incredible speeds with no drama and no fuss.
The M3 is a completely different beast, it is an all out sports coupe that eggs you on to push it as hard as you can, and you will bottle it well before the car does.
The 335i is about the same speed as an M3, and with a simple remap or add on box it is around .5 second quicker, I had times of 4.5 seconds to 60mph on our 335i sport touring auto with a box on, it is a seriously quick car, and very similar in delivery to the C32.
But it really does depend what you want from your car.
I sold this....
To buy this...
As I needed something to gobble miles up in with a bit more comfort than the CSL, however, after a few months I realised I had missed the point of fast cars completely, who really needs a 4.5 second car for racking up work miles in, so I sold it and bought...
This....
And this....
Probably the best combo of cars I have owned.
But agree on the image of the M3, I got pulled 4 times in 2 months and got 6 points, and they were all while keeping up with traffic, one was 59 in a 50, the other was 46 in a 40 and the guy even said "you will always get tugged out of the crowd as you are in an M3 and as the prices fall you get morons buying them."
So I sold it. Shame as it is probably the best all round car you can buy, extremely comfy, will do 30mpg on a run, will keep up with most things on the road but more important than that it makes you want to go out for 'one more drive'.
Seriously, I would suddenly go for a spin at midnight in December and be gone for 2-3 hours, how many cars get you like that??
So an almost perfect car ruined by its own popularity and achievement.
If it were me I would buy a a C63 estate just for this reason alone.