Need advice for all-around truck that can tow

i get company trucks as part of my job. I've had 3/4 ton duramax's and loved them. currently i have a 1/2 ton 5.3 mds sierra.. i towed a trailer to Ohio and back without a hiccup.. drove to CA and picked up a Dart Sport (roller) and drug it back. 1/2 ton really wasnt an issue. i love a 3/4 diesel, but unless you're doing an assload of hauling, most 1/2 tons will do the job for you..

my next one will be a 3/4 ton Duramax.. but that is because cost is not an issue....