Sorry of this wasn't the answer you were after, but I'm just being me <img src="/metal/html/wink.gif" border=0 width=15 height=15 alt="
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Now we get into what I consider to be the quirks of what may make one machine a better choice for you -- or anyone else in this hobby -- over maybe another once you put the coil to the soil. And believe me, I don't give a darn what ANYONE says about bench testing a detector in thin air, how it reacts IN THE DIRT can -- and often is -- a different story altogether. How it reacts IN YOUR DIRT is all that matters. Period. And really, how Detector X works in your dirt vs. air tests and someone else's dirt will be entirely different. Which is why everyone on any forum will tell you that the ONLY way to make an 100% informed decision is by testing out for yourself whatever detector(s) you're looking at, and anything else of buying off the Web sight unseen is always a crapshoot so you're pretty much stuck with what you buy. But I digress, as usual <img src="/metal/html/wink.gif" border=0 width=15 height=15 alt="
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I hate to be a complete pisher here, but hunting "parks, house sites, and relic sites in open farm fields" simply ISN'T good enough for anyone who has been doing this for a few years to suggest with any authority whatsoever which one of those (if even any of those) detectors you mentioned would serve you better than another. And the reason for this is 100% because no park, old-house site or woods is exactly like the next, and while any of those detectors might excel at the last site, it will pretty much suck at the next site. Guaranteed. Which is why anyone who's REALLY serious about this hobby as 2, 3, 4 or more detectors hanging around the house.
Plain and simple, just like a woodworking dude has more than one tool to do more than one job simply because one tool does more than one thing, those who have been doing this for any amount of time knows the limitations and exceptions of his detectors, and there will never be one single detector that'll do it all no matter where you'd stick him.
The X5 is a GREAT detector that's easy to fall totally in love with, but in my own experience, unless you're hunting 100% relics, its coil and circuitry works TOO ##### GOOD-- which is a very good thing indeed -- except it makes plain ol' coinshooting, quite frankly, a pain in the ass. I could go on enlightening you on this subject here, but far be it from me to set myself up for having one man accuse me any further of trying to single-handedly "ruin" his business by posting such insights.
And really, all in all, you can't compare metered machines to unmetered ones in the same breath. So for your shopping purposes, compare the features and performance of the X5 with the Tejon and the Cortes with the DeLeon, and then when you've come up with whatever detector wins the metered competition and the metered competition, just basically figure out whether you still want a metered or unmetered detector and choose accordingly.
As for your wife, I really don't think anyone out here in forum-land would argue about Tesoro's pinpointing capabilities, regardless of model. Tesoro's $150 Compadre pinpoints and discrminates ever bit as well as its $800 or so LST or Cortes or DeLeon. Present ground balance? Stick a $250 preset-GB Silver uMax in her hands and watch her go in just about any dirt you can throw at it, IMO.
Scott