Another thing to think about, if your truck is your daily driver, is how well it works as a daily driver.
As a daily driver a 3/4 and 1 ton are worse in nearly every single way compared to a half ton. They're bigger, less fuel efficent, they ride significantly worse, are harder to park, and have slower acceleration and longer braking when unloaded. While they may be better the 10 days a year that you tow, they will be worse the other 355 days. Technically because of the increase in stopping distance and decrease in acceleration, a 3/4 or 1 ton truck is less likely to avoid an accident that you may have been able to avoid in a half ton. Similarly equipped trucks, a 3/4 takes 10-15 ft longer to stop from 60 mph. So they're safer 10 days a year, and less safe the other 355 days.
Ride in both and compare. My Hemi Ram 1500 rides great, my cousins hemi ram 2500 rides horrible.
No question, if you're buying a vehicle just to tow, the 3/4 or 1 ton is hands down the better choice. It's not as easy to argue if it's meant to be daily driven.