I've had many trailers and tractors. If you plan on hauling with a loader and rear implement, the longer is better. I prefer a deck over trailer as I sometimes haul my tractor with the mower, and a landscape trailer or car hauler is not wide enough with the mower deflector in place. I don't like messing with fenders, either.
My trailer is an aluminum R&R four-place quad hauler, and I had them beef up the ramps to carry my tractor and then some. The ramps are light and store on the front of the trailer as a bulkhead, and the stake pockets allow me to add sides for mulch, and the 8x16 deck allows hauling unobstructed. It's truly a multi-purpose trailer convenient for tractors, quads, furniture, mulch, rocks, etc. it weighs about 980#, has a gross weight of close to 5,000#, has double torsion axles that provides a smooth haul for moving furniture, but easily stands up to rugged use.
It doesn't rust, has five-spoke aluminum mag wheels and all LED lights with dual electric brake axles. It looks great, and hauls even better.