The E92 M3 is an ungodly car, to be honest it's perfect minus 2 flaws. First off, the gas mileage is atrocious. Second, full coverage insurance for someone your age WILL exceed half that lease payment or close. I owned a E92 M3 when I ran my own insurance agency, mine was a white hardtop convertible with red fox leather and a DCT transmission. Incredible was an understatement lol. I got funny looks, but you have to do what makes YOU happy and not others. You won't be sad, trust me. But... Make sure you can afford a lease through Exxon mobil for gas, and huge insurance rates. Lastly, this car is no toy, it absolutely will get away from you. I've owned ungodly modified cars and I'm an above average driver and the car found my limits real fast, not the other way around.
Honestly I drove a 135 and I sure loved it, but it's no M3.