New truck for towing.

Hey all,

I am looking at buying a new truck. I own a business that requires me to pull a 20' enclosed trailer about everyday. It usually weighs in about 7-11,000 lbs depending on the day. My average trip is 120-150 miles one way. I live in southern Missouri ( hilly country).

I drive a 3/4 ton now that handles it fine but I am thinking of upgrading to a one ton and maybe a dually. What do you all recommend for my situation.

Thanks.