Got the Street Ultimate Elites from RSS in my car, ride is very good considering the spring rates. Damping range is pretty incredible, can crank it up to very stiff, build quality is great, much better than older Japanese Tein/Cusco coilovers Imo (if this stuff is Chinese its the good Chinese stuff). Pretty much live up to the name I suppose? On full soft they're very very close to a stock STi for comfort imo (get a bit upset by massive bumps obviously, they are a coilover). On full stiff they're very firm, too much for the road.
I didn't go for the Reds because of the cost and the fact that I'm not competitively tracking the car, quite happy to be more comfortable and slightly slower/richer. I also don't plan on using a slick or full race tire on the car. Didn't get the option of the Primes through RSS.