Sounds like a fun car to zip around in!
I'm in a Genesis right now, and would love to try a G37 for comparison.
The Genesis really does have an Asian Luxury Brand feel to it, and those headlight accents are real head-turners. But, after driving a couple of Sonata generations, my experience is a still little dampened by the brand stigma.
How are the seats in the G37? I find my self sliding into the door or the console quite a bit in the Genesis.
Definitely loving these 300+ hp rentals.