What do you think about this set up?

Dry weight is somewhat meaningless, particularly if you are stating brochure weights. I know my TT was much heavier than stated from factory, not a biggie since we had more than enough towing prowess in our 3/4 ton Chevy HD truck. I am sure your truck can pull your intended new TT, maybe even the space shuttle like a Toyota truck. It is not always weight but TT length when it comes to half ton trucks, flatlands may not pose as many difficulties, mountain and high elevation travel will certainly tax your engine and tranny. It all amounts to towing comfort for us, we live and do most of our RVing at high elevations, we enjoy having the power to merge and stay at posted speed limits, and the added safety of strong and capable braking system. We have friends and family with similar setups (half ton and 30' TT) that will tell you in a minute they wish they had more truck, it is ultimately your call, you could always upgrade to a more capable truck in the future. Our truck is not a daily driver and just sits idle until it is called to towing duty.