If you need ground balance for soil mineralization then get the vaquero. If your soil is mild, get the Cibola. Either way you can't go wrong. You won't have a display jumping all over the place in trashy areas, instead you will learn to listen for a solid tone. One thing you will find Tesoro is excellent at is target separation. If you disc. out the trash you get pops and clicks when passing over the trash. When a non-disc target is hit you get a nice clean tone. Slow down your sweep speed and zero in on the target. I have dug many targets with tabs and nails above the target that the disc. knocked out. I have found several nice coins in trashy areas that I know have been heavily hunted. The Tesoro (Silver uMax in my case) was able to easily pick the targets out of the trash. Some of these areas are so trashy that I can't go 2 inches in any direction without hitting trash. In these cases I set the disc. just past pulltab and before zinc penny to eliminate trash and just cherry pick the coins.
I think other manufacturers make good machines, but at present I don't know because I have only used Tesoro products and extremely happy with the value verses performance factor. If you do decide on a Tesoro, be sure to call one of the forum sponsors to get a better deal on your detector. Whatever you choose good luck and keep us informed.