After towing my NT 31BDSS with a 2003 1/2 ton extended cab Chevy for three years, I finally upgraded to a 3/4 ton crew cab. As far as your ford goes, You can probably do fine on flat runs but when it comes to the mountains you will probably want to upgrade to a 3/4. It all depends on how far, and how often you tow. You'll probably prefer the 3/4 ton truck.
The few issues I had:
1. Between tongue weight and truck cargo was easy to max out the payload and potentially overload the truck.
2. I usually ran between 55 and 60 on flat runs, I could get it up to 65 but usually the combination did not ride as smooth, even with an equalizer hitch.
3. Tires had extra bounce in them when towing on rough roads so it could be pretty uncomfortable.
After upgrading, The three issues were no longer any problem