gjetzen, I know the Curt Q series was not on your list, but I just put a new Q20 in to replace an old Husky 16k. The difference is night and day between the two. The old husky would creak and groan and bang when going at low speeds, and making transitions. The new Curt is quiet with none of the noise of the old husky.
I towed our old Mountaineer to the dealership and left with the new 3120RL, and the results were the same with both trailers...nice and quiet!
I believe either one of the two you are looking at will give the same results, but if you can pick up the Curt for a good price, it will too.
regards,
D