Well for me it was a whole different ballgame. I don't use disc on the Xterra so it picks up EVERYTHING under the coil. I was amazed at just how much stuff is under the coil! The Vaquero would pop and click as it was disc'ing out the iron, or foil, etc. The Xterra breaks these items down into 19 different tones (with corresponding ID#s). This way if there is a silver dime next to a piece of iron, next to of a piece of foil, it will give 3 different tones (& ID#s). This lessens the chance of the iron masking the dime, as it is picking up both the iron and dime (& foil). It was a bit overwhelming at first for me after coming from the single tone of the Vaquero. It actually sounds like its singing a tune, it is so responsive. This is why the Xterras should be run at a moderately slow speed of 2-3 seconds per swing, if you really don't want to miss anything. There is a constant threshold hum (like the all-metal hum of the Vaq) so you can tell right away if a disced out item is under the coil as the threshold will drop out (or null). Of course you can also use 4, 3, 2, or even 1 tone if you desire, I just prefer to hear all the different items under the coil. Something about the Xterras that isn't mentioned often is the visual pinpoint. It works with the audio pinpoint to help narrow the target down quickly and easily. It is very accurate.
Precisely why I mentioned trash density and mineralization in my post as qualifiers. I only sought to save you some $ if you hadn't considered the option of coil changes already.
atomicscott is right about the 3kHz Digger. Just as with your Silver, slowing down is key to success in heavy trash. I've used my 6" 3kHz everywhere from celler holes, to recently re-modeled and re-roofed old homes, to busy trashy public parks & schools, and it's ability to separate coins from trash is remarkable.
