Well any of the rifles you mentioned are good rifles. I can not say enough for the Thompson Center line of rifles. I own enough of them. I also own a Knight and a couple CVA's. All of them are excellent shooters. If all your going to do is use it for five extra days a year, and your shots are going to be 100 yards or less, and your not one who loves to punch holes in paper, then the CVA would do you just fine.

Go in and shoulder the weapons. See which one fits you the best. All of them have a great warranty so if price is a factor then get the Optima Pro. If your shots are 100 yards or less, save a little more and get the shorter barrel version the Optima....

I personally would go for the Omega. I think Thompson Center is a great rifle... hands down.