I'm not a guy who can talk about how compression and rebound damping affects ride and handling, or how this shock is better than that one, but I can say I replaced my creaky Tourer shocks with used IS shocks, and I am happy with them. Maybe I just haven't experienced better.
I moved my current I/S's trunk and shocks to my Tourer when the shocks had ~12Kmi on them, and the Tourer had ~4Kmi on it.
They've gotten another 12K on them since the swap and still ride nicely - solo or two-up.
Next go-around will see a set of Works Performance shocks installed.