Sorry for the posts lately, but I want to get this right. I'm looking at two different TT's. One is 4500lb with a 450lb hitch weight, the other has a front kitchen with a 5500lb weight and 700lb hit...
I understand why you are hung up on tongue weights but understand those two tongue weights are dry tongue weights and truly not respective of what they will be once loaded. It might help you better to tell us which too TT you are looking at. Check the owners forums for those brands and see if anybody has had towing difficulties with either of those two TTs and a properly sized TV.