New M3 is a fat pig, just like all of its competition (Audi RS4, etc). Expect the price to be $70k plus. Every generation cars get a little more expensive and a little more techno-savvy. Gotta keep in competition with the rest of the world so all the cars weigh close to the same, same power, same technology, etc.
That's why BMW is bringing the 135i over. 285whp twin turbo stock, 3050(ish)lbs, and a fixed-caliper brake setup 6 piston front and 4 in the rear. There's your entry level sports car.
But if its just your street car, you're never going to really feel that the M3 is heavy especially with 420bhp. It's going to haul ass and thats all anyone cares about when they are getting groceries. If you're hitting the track with it, I can think of 650lbs of dead weight you can pull out of it with basic hand tools.
Not feelin the look of the new 3 coupes (E92). Concept photos of the M3 4-door look wicked tho.