I think others have opinions, and I normally do not purchase extended warranties, but we were sold one when we purchased our rig, and it has close to paid for itself with getting a new fridge cooling unit installed. In hindsight, I would have waited until the factory warranty was close to ending, then would have purchased one on my own. Now, we are positioned to be able to start putting away a fund to self warranty our rig, which we will do as the warranty expires. It can be a hassle dealing with the warranty companies, and there is also the unknown if one is still in business when you need it.
As far as the model rig you are looking at, it's like buying a truck or car, whatever makes you happy and fits your needs, is the right one. Good luck and safe travels with whatever you decide on. The only big thing to consider is getting the G range tires instead of the 10 ply Chinese tires right away.
Bob & Becky
2012 Chevy 2500HD D/A CC 4WD