As therink points out your truck will be well over its payload. The pin weight alone will be much more than the truck is allowed.
The Cougar Xlite series has some comparable weights but they will still exceed your payload considerably. The new 3/4 tons have a much higher payload capacity (mine has 3400 -4000lbs depending on which chart you look at) and allow more leeway. I guess bottom line is I would stick with a TT with your existing truck...IMO. Keystone has some nice TTs that are made for the two of you. We bought a 2014 Cougar High Country (discontinued
) basically for two folks and we love it. After spending yesterday afternoon looking at 5th wheels I came to the conclusion, for us, the only reason to get one would be the improved towing experience and the much larger tank capacities.