C6400hp

1LT Z51 C6.

mav

Dr. WOT

If you already have a ultility car, then I'd say something with some luxury and boatloads of torque.

used:
S4
E39 M5
CTS-V
330i ZHP

New:
IS350
RL
330i
A4 3.0

Big_Al

996 I've found is an excellent complement

mosesbotbol

Go for a Mondial coupe, should be able to get something nice for 40K and a nice compliment to what you have right now.

Poindexter

I sugest doing something European - you've already got a domestic and a japanese car. Get the world's full driving experience in your garage

I know of an M3 that will be on the market soon

Saki GT

You could sell the Jeep and get an SRT Jeep, or sell the Jeep, get a Subaru Legact GT and mod its suspension, turbo and intercooler and pull sub 5 sec 0-60 times and still have a utility vehicle.

I also like the idea of an M3 though, since you don't have anything in the sedan category. Its a blend of sedan room and sports car dynamics.

kntrider

I would get a G35 coupe with navi, the best affordable coupe on the market imo.

or go with a nice luxury car to complete your collection, i'd go with a used lexus ls430.

i'd also look at the new sti

dmz

I seems to think differetly than everyone else. If I was to get another high performance sports car it would replace the S. Otherwise it would make more sense to get something opposite and completely different to the S to complement it. Something bigger, comfortable and versatile that can carry my motorcycle. A pickup truck would fit that description nicely, something like a Toyota Tacoma or a Nissan Frontier or if you want something full size like a Ford F150 or Nissan Titan.

Penforhire

Either high luxury or high muscle, so I'd go with either the (5-series, E-series) or (C5 Z06, Mustang Cobra).