I'm getting 17mpg highway in my supercharged reg cab...about 1 mpg less then the '97 Dakota 4x4 V8 I had a few years ago. With the pedal to the metal I was getting 5 mpg. At 75 mph your running about 1500-1700 rpm in 6th gear so gas consumption isnt all that bad considering.
I cant complain about comfort. With a nice stereo, cruise control, and fairly nice seats it makes for a good long distance commuter. Like the Viper, you never see any commercials for these trucks thus everyone thinks they have Hemi's in them. Add to that you can buy the SRT Ram hood and other items and put them on a Hemi Ram.
You can put the Hemi theory to bed once you hit the go pedal, theres no confusing the SRT Rams performance to the Hemi version.