I've had both. On my 97 +4 Suplex got rid of the nodding dog syndrome at speedo was overall better but the car had before knackered king pins & shocks.
My 06 Roadster has a different camber angle and AVO shocks. It handles far better than the older car even with Suplex. I don't see me needing on this car to upgrade. But it is a personal choice.
I have had both roller & organ peddle. Frankly I see no difference unless you want to toe & heel.
