Okay here are some numbers for you.
E36 328i weighs 3125 - The E36 M3 weighs 3175.. Only 50 pounds more.
E46 328i weighs 3197 - The E46 M3 weighs 3219.. Only 22 pounds more.
E90 330i weights 3417 - the E90 M3 weighs ????.. But IMO will only be between 25 and 75 pounds heavier.
The E60 550i weighs 3844 - The E60 M5 weighs 3980. Thats 136 pounds.
But the M3 is bmw's real (sports car). So i think that it would not be to much heavier then the e90 330i. And plus it is going to have like 200 more hp. I think a couple pounds will be fine haha.
It does not matter what you all think the M3 will be on top of its class like it always is. The New M3 Can And Will Kick ASS...
M-tech E90 330i JB/TERRA modded - RIP
n54 135i AW/CR JB3 FBO 420whp 444wtq - 11.5 sec 1/4 mile @ 122mph - RIP
e53 X5 4.8is M///BLUE/M///SUEDE - 357whp 369wtq - The Snow Beast!
n54 135i JB/CR JB4 FBO - Tc Kline D/A Coils - 1/4 mile/dyno PENDING