The 2006 Cadillac Escalade is a nice ride. It has an exceptional sound system and lots of bells and whistles. Unfortunately it requires premium fuel, ouch! But the gas milage isn't that bad. I drove nearly 180 highway miles on a 1/2 tank, mostly at 60 mph.
The adjustable seats, sound and nav system, and the vehicle info readout.
An engine that would function well on regular fuel.