I have an Ultimate Slam on my slug gun, and I'm very happy with it. It's great at the range, and even better in the field. I got my buck the very last day of rifle season, from 125 yards out. He went down, rolled over three times, and was dead before I got to him. (I was excited and ran because this is my first year hunting.)
I prefer the US slightly over the Omega I have on my muzzleloader because it has the 50 yard aiming point that the Omega does not have.
Busta, I wonder if you waited until after the new year and the vast majority of the hunting seasons are over, if the prices might come down a bit. I got mine for $179 from a friend who has an FFL, so I'd think there is some room for Cabela's to offer a better deal than they are right now.
Good luck,
Alex.