I have had many a uMax models and the Vaquero is hands down deeper. It is also quite stable and a good discriminator, with that wide span ED 180 discrimination. It is easy to ground balance and stays that way, too. It is everything the Bandido or Eldorado was and more. It is hands down a great relic machine.
Of course it is lightweight, yet solidly built and is downright miserly on batteries, so those things dont hurt, either!
It makes a great park hunter or school yard whipper, too, as it has sharp fast target response. I keep the 5.75 coil on mine most of the time, and it makes a dandy trash hunter in such places. Even with the smaller coil it has good depth with the SENS turned down, allowing you to get in close to metal structures.
I am not in love with monotone, beep-dig detectors, on the other hand. I would ask Tesoro to change only thing on the V - add selectable tone ID, like on the Golden. They could mount a selector DIP switch to one side of the battery compartment and a small CB with the audio filtering circuitry below the battery, or on the back of the main board.
Another option would be to redesign the Golden, using the Vaquero circuitry... that'd be near perfect, IMHO.