Welcome and congrats on looking at a new rig!!!
I was actually going to suggest the Jay Flight 26 BH (no slide) or the 27 BHS (slide). The Flight's have a little more options available, and usually a little more cargo capacity vs the SLX model. Though you won't go wrong either way! There are other manufactures with the same floorplan as well if you choose to consider other manufactures. We have been very happy so far with our '16 Jayco. Few minor issues, but so far so good in about 15 months of ownership.
As mentioned, the big issue you face is the payload of your truck. As a starting point, there is a yellow sticker in the drivers door jamb that states "All occupants and cargo not to exceed XXXXlbs". How much is this stated payload?
As the sticker states, all passengers, cargo (coolers, bikes, firewood, etc) in the truck, any accessories added (truck topper/tonneau cover, step bars, etc), the wdh (weight distribution hitch), AND the tt tw (travel trailer tongue weight) all count toward the max payload of the tv (tow vehicle).
Make sure you get a good wdh with integrated sway control if you don't have one already. The Reese Dual Cam, Reese SC, and the Equal-I-Zer 4 way system are all very good models.
Good luck!!!
