Gamo 440...
That's Gamos' bread and butter rifle. The 220, 440, Silver Shadow, Shadow 1000, 890, etc are ALL cosmetic recreations of the 220.
I have a Shadow 1000. It's not a BAD rifle. It has some good features. It's lightweight, pretty accurate, and easy to cock for the power. It also has some not so good features. The trigger pull is not up to par and breech seals wear out in short order.
A Gamo is usually ones' first air rifle simply because of their fantastic advertising. No one spends more. With all those advertising dollars from magazine to magazine and air rifles in every major retailer, it would be hard to believe that they are not the best air rifle out there, BUT they're not.
The question is, "Is it up to the competition?" If you know where to look the answer is NO. For around $200.00 you just can't beat a BSA Supersport or a Beeman HW-30S. Also really good rifles in the same price range are the RWS 94 and 34. I'd rather have one of those four than a Gamo 220/440.