I have seen High Voltage's truck up front and personal....even sat in it, although I felt like I needed a running start to get in lol (I'm SHORT 4'9) I also have an EXT, but it's an Envoy. I have been thinking of lifting mine as well. I have to say that the EXT's look no different lifted as their shorter wheel based brothers. In fact I feel it makes the length less of an eyesore...takes attention away from how long the truck is...which I like because the long wheel based on the Envoy's remind me of Man Vans...a van a man would drive
In my personal opinion, I would do a suspension lift because with the body lifts you will most likely see the frame under the truck. I seen pictures here on the LiftMeister's thread of customer pictures...someone there had a 3" body I believe and you could see the frame of the truck pretty good from the underside. I personally don't want my frame to be showing so I would go with a suspension lift. But if you don't mind it then the body lift wouldn't be that bad.
I also do believe that High Voltage has both a 3" body lift and a 3" suspension lift...plus HUGE swamp tires lol but it is really a beautiful truck.