One thing to be mindful of is the vertical height of the "clearance" of the rear ramp door.
I was ordering a 6x12 V nose aluminum trailer with a rear ramp door. The opening of the "door" was sufficient, but the spring assist mechanism to help raise and lower the ramp door falls below the upper opening of the door.
Fortunately, I measured one BEFORE I placed my order, and found that the "real" opening was 2" to short, so I simply raised the roof of the trailer 6", so now I have 4" to spare and it's easy to ride in to the Condor chock.
It would have been an expensive mistake.
Separately, I considered a 5X10, but, in the end chose the 6x12 for only 200 lbs. additional empty weight. I have no regrets.
Short answer, I'd suggest you ride your wing to the trailer you're considering and "load it". Nothing like trying it.
Good luck.