It really isn't hard to beat R brakes when going to a proper multi-piston setup with 2-price rotors. R brakes really aren't much of an upgrade.
Edit: should clarify, I mean for track usage. Great for moderate street/ light track/autox type driving. I'm assuming you're selling them? Might be interested if you are.
Personally, I liked the R brakes, thought they were fantastic at the track. Never did I have a over heating, fade, warped rotor, etc issue with them and I'm hard on brakes. I've had stock, R, 17z, boxter and now the Stoptechs so I have a decent ammount of experience to compare them to.
Answer to edit: I traded my whole front R setup for these. My setup is practically new and the stoptechs were beat to hell and needed a full rebuild so I think the trade was fair, sorry brother.