GM SUV Quality opinions wanted. Maybe expedition ecoboost.

FWIW I had a 97 Suburban, a few years ago I traded it for an 08 Suburban.
The 08 is smoother, quieter and gets (very) slightly better mleage than the 97.
I think the 97 was a better built vehicle, It was very reliable. The 08 had a door handle problem and the dash cracked.

I'm satisfied with the 08 but, when I decide to move up a few years the Expedition will be at the top of my list.
That said, I only tow a utility trailer and mostly use the 08 as a daily driver so, I can't comment on the RV towing ability.