With Infiniti's G lineup, there's something for everyone. The brand's best-selling car is offered in sedan, coupe and convertible body styles and in several performance levels, from the base G25 sedan (reviewed separately) to the high-performance IPL version of the G37 coupe, which is covered in this review. See them all compared here.

The 2012 Infiniti G37 IPL coupe is fast and agile, and it puts the P in Performance, but it's not cheap. Yes, you get an extra bit of power, but you're also stuck with a more brittle ride and ear-numbing road noise.

Moreover, the G37 coupe is already a winner in the class; the IPL version increases the price, but it doesn't add much value.

The IPL treatment adds a boost of horsepower, a sport-tuned suspension and specific interior and exterior trim. The coupe was the first vehicle in the IPL stable, and it will be joined by a convertible model later this year. Click here for our review of the G37 sedan.

• Smooth Power, Rough Ride
• A Tight Fit
• Cabin Comforts
• Features & Pricing
• Safety
• In the Market