270 HP is a bit much for FWD. At least in the "refined sedan" sense. Yes traction control can modulate torque steer but only by applying the brakes! I definately like the TL interior though. I think you'll be happy with your choice but.....
The G35 chassis dynamics are superb. I drove one for about 3 hours about 2 months ago. Z-car DNA as they say! BTW the mags have been putting G35 at the top of all comparos, equal to BMW handling, equal to better thrust, winning value. And the sedan is a looker(subjective)...as nice as 3 series, much nicer than Audi, or the TL (The coupe is flat out beautiful). If they would work on the interior a bit it would be nice, but for low 30s..hard to beat. Overrated????