Do you currently, have a Float R? If so, I must say that I wouldn't uograde the shock.
Up to this week, I had 2 '05 Trances with Float R and RP3?
To be honest, I don't feel the RP3's adjustable platform makes a great difference in performance (in Maestro at least). I mean, you can feel the differences in the 3 settings, but they are not that big.
I tested an RP3 on a Heckler, and on it the RP3 was definatly worth the $$$.
I think would send the Float to Push, to be dialed in, rather then upgrading to RP23.
Just my $0.02