Your dealer sounds like they suck a bit but TL is quality and the first mentioned because, IMHO they are one of the best in the business. There are others as well but I think TL gets pushed because of that fact. They are not cheap, that much is correct.
Like I said if you can work within the limits of your setup go for it. That is perfectly acceptable and I'd the same. I needed a 42" extension to get past my TC, it was mandatory for my needs.
Good luck just watch your equipment. I believe it was boatycall that had a factory hitch fail on him so you might pick his brain some.