I know floats using air pressure vs springs to control prelode cover a very wide range of rider and quad weights....but what about valving.  do they still use conventional valving which is tuned specific to riding (desert vs mx)  or is all that tuned through air pressure too....

Reason I ask is I am looking for some nicer shocks for my rappy.  I have been looking for something used but want something set up for me.   I push 270 lbs so i have yet to find any used shocks for a big guy like me.  I was going to buy some used yfz450 shocks and have jerry or race tech revalve them.  but springs and revalve from race tech is an additional 600 bucks. so I would be into fronts for about 800-850.

I can buy top of line used fox floats for 550-750.  I know spring weight would not be an issue but what about the valving for my weight and desert/dune riding.  Cost asside at the end of the day which would be the better set up?