I'm not a huge fan of the Pronto's. They are VERY nice remotes, but not very user friendly. I am not claiming this from a programming standpoint, mind you, but the thing is just too damn big and does not fit nicely in the hand, and cannot be used with one hand. I have really taken a liking to the NevoSL remote, little less than the Pronto ProNG, at $799, just as powerful (if not more), and can be used comfortably with one hand.
http://www.mynevo.com/