I traded in my 2007 Tundra on the Chevy HD3500 because of the weight of the toy hauler.
I totally enjoyed having the Tundra for 5 years. It was solid and very well built. I ran into the guy that bought it from the dealer and asked him how he liked it, just a big smile on his face and off he roared. BTW, I bought the Tundra while living in Mexico so 90% of the gas it burned was Mexican gas, all without any problems. I did have a water pump seal go out but extended warranty paid for replacement. The Tundra had a lot of hidey holes for storing stuff, three times more than the Chevy has.
Concerning air bags, I would negotiate them in the price. It would be better to not need them than to have to add them later.
2013 Voltage 3800, 2012 Chevy 3500 HD
2010 Yamaha V Star 950
2009 Yamaha Raider
Volunteering with Habitat for Humanity Caravanners