Around here you can't really buy a nice half ton for under $15,000, and a nice diesel starts around $20,000. Big reason for going gas is price, I'm planning on paying cash, or at least 70% cash if its more than I'll have saved by then. The other main reason is I don't need one 90% of the year. The only time it would really be needed is when I would pull the sleds to the mountains. We only make a few trips per year, so buying a diesel for those few trips in a year would hardly be worth the extra price. We have done it with a gas before, and it works fine. My normal every day use is driving back and forth to work, carrying my sled around in the back when sledding locally, and a quad in the summer. I would love a nice diesel and would buy one over a half ton gas any day if they were comparable in price. but for the difference in price I just can't see it happening. If I can find a nice one in that price range I will consider it though! Cause I would love one.
And my reason for not wanting a 3/4 ton gas, would be fuel mileage. The extra weight and braking power would be nice, but if it's still a gas, in a 3/4 ton, then your gas mileage is NOT GOOD. So it's either a half ton gas, or 3/4 ton diesel if price will allow. But for most of my daily use it would be over kill.
And I'm not very into the titan, but I want to know more about it, the rest of the brands I know pretty well, but really have no idea on the titan. My buddies' boss has one, and my buddy drives it quite a bit for work reasons. He currently owns a 07 chev half ton, and says if he was in the market for a new truck he would hands down, buy a titan. So that sparked my interest a bit.