I went through your same dilemma this past couple weeks. But my situation was a couple 08 denali's with over 100K vs. a 09 Yukon SLT with Nav/backup cam/DVD/Roof/20" wheels/etc. for 5K more and only 57K miles! Needless to say, I opted to save myself the cost of premium fuel and the lesser mileage in favor of the lower miles.
I will say though....I miss the power of the big 6.2......but its my wife's daily, so it'll be fine for her!
Yeah in your situation I could see the justification for going with the slt...I had the 5.3l in my last tahoe so this 6.2l is new and I gotta say I like it better all around and don't mind the mpgs..I've driven about 300 miles so far and got 17mpg mostly city driving
---------- Post added at 11:35 PM ---------- Previous post was at 11:31 PM ----------
Also I found out the problem with the backup camera, I took the rear applique off and took the connector that goes directly into the camera out and it was corroded as shit, the pins coming out of the camera were actually green and one snapped off into the wire connector...So needless to say I think I need a new camera, and maybe more than that.