Track driving is definitley one of the best experiences. Willowsprings is a great course!!! But just to test out the speed of a car, the 15 north from LA to Las Vegas is really nice at night when there is no one out there. I've hit 175 in my M3 and it was amazing that the car was still so stable.

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Lemans Blue X5 4.8is
Dynaudio
Diamond TDX 12" subs x 2
Xtant X604 x 2
Xtant X1001 x 1
VST 7" LCD x 2