I was of the notion of replacing the seats with aftermarket ones but after getting a feel for the leather seats, they are certainly good. I opted to go fully loaded touring with sports etc, platinum graphite with black interior. I wanted my 1st 350z in the silverstoney color but never found that when I was getting it, but this time I get my wish from the get go ^.^
Good luck in deciding on the color
I wanted a blue at first but wanted something more low-key and PG is simply the best to keep clean etc, and doesn't attract as much attn as the red/blue.