Which SUVs to consider....your opinions please!

[TexasCamper]

Hey everyone,
I'm entering the shopping market for a SUV. I'd like the tow capacity to be north of 5,000 lbs. so I can have more flexibility with packing my 3023 and traveling more Rocky Mountain passes and higher elevations.

I've noticed that the current batch of mid-size SUVs (like Ford Explorer, Toyota Highlander, and Chevy Traverse) quote a standard 2,000 lb tow capacity but a 5,000 lb tow capacity with their tow package. I'm skeptical on how a tow package can more than double the tow capacity. Your thoughts?

So I'm looking at larger SUVs such as Ford Expedition, Chevy Tahoe, GMC Yukon. These are in the 6,000-9,000 lb tow capacity.

So what SUVs do you suggest I look at?
(p.s., considering used vehicles say 2010-2014 vintage due to sticker shock of some of these 2015 models!)

Thanks,
John