RE: TC Omega X7
Performance wise, I would not be all that concerned. It's an Omega and it should shoot just fine. With the shorter barrel you might loose a little velocity but nothing to get concerned about. Knight, White, and others have sold 22" barrels for years and they shoot just fine, even at long distances, and the deer are just as dead.
I looked at one last week at the store. They sure have a nice laminate stock but I was not real impressed with the peep sight. It did shoulder well and seemed balanced. It would be fun to have one just to see what I could make it do..