LAST EDITED ON Mar-07-13 AT 01:20PM (MST)[p]Congratulations on beating astronomical drawing odds!
I am guessing, since you have to ask what units are best that you are probably a novice to sheep hunting. It is my opinion, if you want to do it right, you will need to get to know Utah desert sheep. Knowing what units are best is the tip of the iceberg.
There are no waltz in and shoot a monster ram areas in Utah. They are all rugged desert landscapes holding limited numbers of sheep. Even in the best units, Desert Sheep hunting is hard and way different than deer or elk hunting. Being successful either takes serious dumb luck, or a good deal of experience by your side.
Hiring a guide will solve all of that for you if you can. There are several who are good, as was previously mentioned.
I am far from an expert, but I am willing to share what I know through a PM.
Good luck