The RMs are great daily springs. The problem is some people blame their suspension harshness on the Road Magnets when they should be blaming it on the high settings they've put on their KYB AGX struts (I fell for this too). If you get AGX struts and set them on the softest setting, the springs ride like marshmallows. The springs themselves aren't stiff at all in my opinion, and without stiff struts, would be pretty bad on the track. Same goes with the Hypercos.
Controlling the suspension stiffness with struts isn't the best way of doing things, but I digress.