Got to start to put together another hauler (see sig). I'm looking at hitches and ran across the Reese Signature Series in either 16K or 18K. The only difference, other then cost, is the 18K pivots side to side as well as fore and aft. I want the side to side pivot as it helps to hitch up in uneven ground. Anybody have experience with these, and have a good place to order them from at a discount???