Thought I'd throw this in here, but my eXmark dealer's prices have only about $100 difference between fixed and floating deck gear drive walk behinds (fixed deck- Metro, floating deck- Metro HP). Didn't price hydros, but for $100 extra I would spend it on a floater no matter the size because of the fact that you don't need to be right at the trailer to change the height of cut. I have a fixed deck 52" Scag (hydro) and I set the height at the highest in back and moved it around on the casters to each spot and measured and it maintains the same pitch in pretty much every setting. My blades only have one spacer above them so maybe it varies alittle if you have say 4 spacers above the blades. Its hard to explain the physics of it, but a fixed deck doesn't lose as much pitch as you might think when changing caster heights, because of the pivot points. I can't explain it.