Joe,
We have used Cobra seats of all different types for a few years and they are well made and good quality for the price.
My only problem with the RS seat is that Cobra won't put seat belt slots into the sides for a 4 - point harness other than this we would use more of them.
OMP have also introduced a range of Vintage Seats
http://www.ompracing.it/prodotti.html?categorycode=GSEDILIVINTAGE&changelanguage=en