I don't blame you one bit for wanting a new TT. I would have considered the buy used advice, but most likely would have gone with the new one anyway because I could afford it and that's what I wanted.
I also was going to get a hybrid - don't know why, just liked them. But while shopping during the summer, I noticed a huge increase in the temps inside hybrids compared to fully enclosed. My inlaws have one and their AC runs constantly.
What you also need to do is fully understand the capibilities of your TV. Hopefully you are not focused on stated tow capacity instead of payload. You are most likely correct that your truck can pull the hybrid, but if you decide to go bigger, do your research, and get a weight distributing hitch.
Above all don't listen to what the salesman says you can tow.