Your right John ... I don't see many PI's at the beach in SoCal, except for the Dual Field on occasion. I mostly see CTX, Beachhunter, Bounty Hunter, and the AT series.
The ATX is a depth monster and it had a very short learning curve with me. Although, it does take me an hour or so to get back into the swing of things after using my VLF for a period of time as to getting in sink with what I'm hearing with the ATX. The weight of the ATX is not so much of a problem with me if I take it in doses and not use it exclusively. The problem that I'm finding is that the ATX is a slow lumbering machine. So now I tend to use the ATX in targeted areas slow and deep and use my VLF to cover a lot of ground quickly.
I get torn between what machine to use after a crowded busy beach weekend because most targets that I'm after now, this time of the year, are recent drops. The problem with SoCal is the ocean water is cold all year long and most people, except for kids, don't venture into the water unless the weather is hot. All surfers wear wetsuits all year long. I'm finding since I've had the ATX that most quality targets are on the slope to the low tide mark. Not many targets out in the water. So as the weather heats up, I will use my VLF early AM in dry sand to cover a lot of ground quickly and then switch to the ATX as the tide falls in wet sand.
I can cover a lot of ground quickly with my VLF and I'm not so worried about the depth of the items. The VLF works good where the dry and wet/damp sand meet and down the slope on damp sand. But when I get to the wet sand, you get steady iron chatter from the mineralization. I can pick out quality targets with the VLF in mineralized wet sand, but only in short doses, because it's hard on the head.
If the weight of the ATX was shifted to a hip mount and had a lighter shaft, I would use it more often and use it faster to find recent drops. But as with all machines, you need to go slow and steady to find the deep stuff, so the weight of the ATX is minimized when going slow and steady. Then the problem becomes scooping DEEP, which takes a whole different toll on you