I have a set of aluminum ATV bars that are 2 inches taller than stock. I like them offroad. Not so much on the highway.
I am currently running a set of Pro Taper ATV Hi 7/8" bars. These bars, plus a set of the wider footpegs, make it much easier for me to go from a seated riding position to a very comfortable standing position. I also don't seem to get as much vibration through the grips as I did with the stock bars. I like 'em.
(Sorry, but I don't have pics with these bars on my bike)