The 370Z and G37 are okay cars with okay performance, but with a grown man behind the wheel they just don't look good. The Hyundai Genesis 3.8 (especially with R-Spec package) was the better bang-for-buck, NOW THAT is what a chick wants to see a dude driving.
With that being said, the modern Z-cars (Z33, Z34, RZ34) are cute little birthday presents for a girlfriend or a daughter. It's basically a two-seater Altima with a rear-wheel drivetrain setup and on steroids.