I have an AT Pro Gold and the F75 ltd and like both very much. Depending on what machine you are upgrading from, you might find the F75 to have a little more of a learning curve than the AT. The AT is a machine that you can take out of the box and start making good finds right away. Both machines separate targets well, the F75 is light weight and easy to swing. The AT can be used in the rain and in water hunting. The AT is less money. Last time I was out hunting, I started with the F75, made some nice finds, and then later switched to the AT. I did equally as well after I switched. I have made some very deep finds with the F75, but I wouldn't say that a seasoned AT Pro user couldn't have found them either.