I already DD the Z, so the GT-R would be an improvement in just about every way (except cost). If you're talking about a new Z ($30-40K) + new DD ($25K) vs a used GT-R ($65-70K), I would prefer the new cars. I'd take a new GT-R any day in that scenario, but while I could afford a new DD payment with my current Z payment, there's no way I could afford a new GT-R
lol at the ragged out 2009 Z with a busted CSC and no oil cooler example