Why are you going with a lowboy style? I really like the deck over. I also think the 8ft wide trailers(what I have) are so much better for getting around inside and loading and unloading. We have one spare sled and an inline would require us to move that sled out of the way everytime we load/unload. I would also go at least 22 and preferably 24 for what you are hauling. Not much of a weight penalty in a Triton and you would be surprised how much easier it is to move around inside a loaded trailer with a few more feet to space the sleds apart. You can haul what you have in a 20 though. I just bought a Featherlite today. 24' long 8' wide. The Featherlite's arent feather light. They are at least 800lbs more than a Triton on the 20-24' trailers. Your truck would pull either loaded with ease. I upgraded from a Mirage and the weight is nearly the same but for some reason the Featherlite pulls a lot easier, can't figure that out yet. My Mirage is a steel trailer and 2' shorter but bascially the same weight. It has been a good trailer with no issues but the horror stories I see about them has gotten me nervous about using it on long trips. Gonna sell it now.