This.

If you're a skinny fuck, they're awesome seats. When I go for a drive, I'm out for 3-4 hours and I'll tell you what they really do feel funny on your sides after a while. Mind you, they're amazing seats(for an OEM seat) for hard driving, and are quite comfortable when you're used to a POS 240sx seat. In my opinion, it is a definite upgrade from an OEM S13/S14 seat. When I had the ninjaturtle R32, I got quite a few compliments at how comfortable the seats were, and how well they "hold" through the turns.

If you don't mind putting a little elbow greese into restoring a 20 year old OEM seat, do it up.