In another (related) thread, twyrick posted some great comments on this -
Crazy idea: swap Nismo Recaro seats for Sport?
Like him, I love the old-school analog feel of the 370Z, and want to get one as one of the last of its kind - naturally aspirated V6 and manual transmission - in a time when everything seems to be going towards turbo-4s and 'paddle shifter' abominations. I like the looks of the Nismo, and also like the purely emotional idea of getting the 'top of the line' version, before the 370Z disappears (which it seems likely to do). I love the driving feel of the Nismo, even if objectively it isn't that much different from the 'regular' one.
But, at 60 (-ish), 6'0", and 210 lbs, the Recaro seats aren't the most comfortable for me. So the Sport would work just fine and would be more 'comfortable' for the kind of 'normal' street driving I do, but I wonder if I'll always long for the Nismo...