I was considering the same back in Sept., but ultimately went with the 335is. They were both new however, so the price of admission was a factor to me. Also, I was concerned about the mpgs and tire wear for the M. Nothing beats the higher reving V8, but as a DD, you have to be on it all the time to feel the power and at the expense of fuel. After the test drives I thought I would leave the M with a feeling of "I gotta get this," but I didn't. Overall, the 335is suited my needs better at this time.
2015--F82 ///M4 [ED 6/26/14]
2008--E92 335i [ED 2/23/08]*