If you can afford the price of the Excal it's the only way to fly for maximum depth in a water detector. If money is an issue then I'm big on the AT Pro for it's super low price in a dual purpose water/land machine. Since it also has a full function LCD screen it's also a great land machine. Many Minelab guys have one for a backup on days they want to swing faster while working heavy trash. Minelabs will unmask with the best of them but you have to swing slower to do that, where as a fast recovery speed machine allows you to swing a good bit faster and not risk as much masking targets. The AT Pro won't get the depth of the Excal in water usually, nor will it handle the salt and minerals as well, and on land it won't get the depth of the Sovereign or other Minelabs usually, but in terms of being able to swing faster while working say heavy iron it has it's purpose. It's also more sensitive to fine gold like thin chains than the Minelabs are, which can be a perk to some water hunters, but just the same the Minelabs will bang hard super deep on the thinnest of gold rings. It's just chains and tiny gold earings and such that they have issues with. But way I look at it most gold that's lost is in the form of rings, so the Excal will shine above all others for that IMO...