For me the 370 design was not an improvement on the 350. I particularly didn't like the fangs in the grille. The latest Nismo looks better but still does not have the (almost) perfect proportions of the 350.
I also think the blue on the 370 is not a patch on the Azure on the 350.
Just my opinion really but as I say, others have agreed in old threads on the subject.
Nice explanation there Jords ... just to add, the power difference is negated by lower torque so don't get too hung up on that OP
For me (and a lot of others), the 350 will be the classic as the 370 does not have the purity of line ... I'm looking for a 350 GT4 (2006) which I think will be the one to own