This forum is usually my last stop for stuff to read when all the other forums get kinda dead, so sorry for not posting sooner. I've owned and used three Tesoros (Silver Sabre II, Bandido II uMax, Euro Sabre), the X5, and also have a metered non-Tesoro with notch, so here goes anyway ...
First and foremost, if you're intent on a Tesoro, I think the Golden pretty much is your machine. BUT -- maybe not, given that what you seem to want to accomplish is entirely accomplishable (is that an actual word?) with your X2.
As JB indicates in his post, simply notching out everything else below silver with any detector (metered or not) and cherrypicking that way won't necessarily give you a *true* idea whether your high-trash dirt holds any silver. That's because there's a whole ton of silver out there that rings in considerably lower than dime disc even with non-metered machines as excellent as the X5. Good examples of this are those ancient 3-cent pieces and small jewelry-related silver stuff like small thin rings or small thin religious medallions.
And on top of that, there's also the entirely different but still related subject of target masking and ferrite masking that even some of the most expensive notch and TID detectors can't deal with well or at all. I'm a high-disc cherrypicker from way back, but if being an incredibly *efficient and successful* cherrypicker is your goal, you'll still end up hunting notched in the pull tab range or lower. The trick there is to find the places off the beaten path (like old homesteads and such in the woods) where pull tabs are somewhat rare. But even there, you're going to get horned in higher notch a zillion times by large(r) iron.
So any possible way you look at it, you're still going to end up digging a whole lot of crap you don't want anyway no matter where you go, and if you do nothing but notch or disc really high even with your machine set on full-out sensitivity (which also makes things worse, not better), you're 100% sure to end up walking over a LOT of really good stuff. That's the nature of available detector technology since nobody's yet come even close to inventing the perfect machine.
Otherwise, if cherrypicking silver or clad dimes and quarters is what you mostly like to do (which is what I like to do a lot of times when I only have an hour for detecting and have to settle for quantity instead of quality), you don't even need to be looking at a Golden since your X2 (and even an X3 or an X5) will do that perfectly fine, except you'll be digging tons of Snapple and wine/booze bottle caps in modern high-trash parks that ring and size-out in pinpointing as quarters and halves.
BTW, I'm far from uninformed, but what we do is still and all a hobby just like the rest of 'em <img src="/metal/html/wink.gif" border=0 width=15 height=15 alt="
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Scott