The 1/2 tonne has soft suspension. i tow a similar weight with a tundra crewmax. The longest trip i have gone was 2k miles. I do have airbags running 20 PSI as helper springs. I never felt the need for a HD truck as its solid and feels very planted in every situation i have been .  I have only 140k and did my first transmission service just now. 
If you want to upgrade then get what you want. 
What is up all these wife approving a purchase.Discussion about a house or something big i agree but for a vehicle. That is like me choosing her a minivan thinking it was smart...never again. She replaced with a luxury suv without asking me. Some thing expensive yes we discuss .