i think your truck will look good lowered. if you can afford it air bags are the way to go, they ride super smooth and as you mention, gives you adjustability of the ride height. pretty much youll have the riding height, where your tires will be aligned. and your parked height, which is pretty much as low as you can go, where you can afford some negative camber.
i havent ever done a suspension like that before, but i know there are a few on this site who have air susp and know people that can do it.
as with everything having to do with lowered trucks, take everyones comments with a grain of salt