Oh snap
IMO if you want to go out with the missus or mates, then 370z all day long over a bike, but if you want to get out for blasts on your own when the weather is nice, get the bike and keep the 350z.
Also (not offence meant here) the 350z is now here near "just as good" as a 370z, just read up on all the people who have made the change, the difference is more than you can appreciate in a test drive. Its a lovely place to be, really nice to be able to take the missus places and get out and about but have the power to have some fun too. So glad I chopped my 350z in for one.