At a gun show in my region, I noticed a large price discrepancy between the Shadow line of CZ's and the A-models, the A-models being on the order of over $1,000 more than a Shadow. What do you get for the extra money, and is it worth it? I understand that the Shadow line is a step up from the regular 75 line, but is it the trigger, sights, more refined milling or what? How can I compare apples to other apples?