Screw the G35 and wait till August for Nissan 350Z. Much better and cheaper(Base MSRP: $26,269.00 ). Just read this:
24-valve, 3.5 liter DOHC V6 producing 280-plus targeted horsepower and 260-plus lb-ft of torque
NDIS (Nissan Direct Ignition System)
CVTCS (Continuously Variable Valve Timing Control System)
6-speed close-ratio manual transmission or Electronically controlled 5-speed automatic transmission with manual shift mode
Dual outlet exhaust
Estimated 0-60 time of less than 6.0 seconds
4-wheel independent multi-link suspension with use of lightweight aluminum components
Available Vehicle Dynamic Control (VDC) and Traction Control System (TCS
Long wheelbase (104.3 inches) and wide stance
Raised rear deck for enhanced aerodynamics
Now im not saying that the G35 is a bad car but for its specs(if you care about them...)and the price($29,495.00) and considering styling(check out the Z's body..

), I would go Z.
But thats my $.02