We have lived 181 days in our 8280ws we store it for the winter in 2 days time. We love it and have no complaints. The only mods I did was to install extra bolts in the suspension mounting flanges, there are threads on here to explain why and how. Also to open up and seal correctly the airconditioning passages, again threads on this.
Insist/negotiate D or E rated tires when you place your order!
We didn't bother with slide toppers someone said they flap when its windy and keep you awake at night and just one more thing to go wrong. I just check to make sure there are no broken branches lying on there before closing, 30 campsites later no problem.
As for your truck I spent months doing all the calculations and any three quarter ton has bed capacity IMO not sure about gas engines though as I was always going to go diesel, I went 1 ton in the end as I got a great deal from Northland Dodge BC (plug for them).
I have a short bed and bought a Reese Sidewinder, which I have never used thanks to RV Wholesaler's incompetence, so its for sale $600, I have a slider which gets used occasionally in tight places/
Bang for buck you cannot go wrong with your choice!