Congrats!! I love to Sheep Hunt more than any other type of hunting. I plan on being in the Sheep Mtns August 8th. The way I see it the most important place to start is by getting in "sheep shape" and having a good pair of well broken in boots. If you aren't in shape and don't have good boots then it doesn't matter what kind of a gun you have or how good you can shoot it. Then come optics. Nothing else matters if you can't get to em and then spot em. Here's my "priority list"

Sheep Shape/Boots (gotta get to the sheep) Get out and hike hills/mtns with a pack.
Optics- buy the optics you cannot afford (gotta find the sheep)
Firearm/marksmanship (gotta shoot the sheep)
A pack that will handle 120+ lb load (gotta pack your gear and the sheep)
A bomber tent and good sleeping bag (gotta survive if a storm pins you down)

Lots of good sheep hunting gear/info over at http://forums.outdoorsdirectory.com/
Come visit with us die hard crazy sheep hunters