Had a '08 135i, now I have a 06 997 C2. The 135i was a very nice and capable car. The 997 is in another league. I liked the looks of the 135, but as Armand says, the 911 is timeless, a classic.
Performance wise I don't know how you can say that the 135 is faster. Maybe initially from a standing start, but the 911 just pulls forever. And from 65 to 100 mph it is no contest.
X51! Great option!
Gone: 2008 135i/2006 330i Arrived: 2006 997/Black/Sand Beige Leather/6MT/Sports Chrono Plus/19" Vorsteiner V-308s/Factory Nav/Sports Steering Wheel/Contrasting Mats/Heated Seats/Bose /V1/iPod adapter/Parrot Bluetooth/50% all around/Black "911" script/"Gundo Hack"/AWE black chrome tips/H&R adjustable front and rear sways/Rennline shift knob