Go for the 4S; the all wheel drive gives an already amazing car 'on-rails' performance in the curves. I own a 2005 911 Turbo S -- 444 HP and 457 lb-ft torque, with all wheel drive and ceramic brakes. The way to beat it? The 2011 911 Turbo S -- 530 HP and 516 lb-ft torque, with a zero to sixty time of 3.1 seconds. For reference, the 'super' Corvette ZR1 with 638 HP pulls that 0 - 60 in 3.4 seconds. Yeah, they live up to the hype.