I really was trying to get a feel for how these things stack up. I guess that no one has really done a "consumer reports style" head to head of the units.
Trust me, I hear some people saying Infinium is the best, the Minelab 4500 is best, the GS, the Deepsearch, etc. Too many OPINIONS of the units and not enough head to head comparisons. Yes, it would take someone with deep pockets, or a dealer (unbiased I might add) to do this kind of test.
Of course, they would need to be ground tests of the same target with all machines.
A few years ago, I hunted an area where the Spectrum had supposedly cleaned up. They said no more targets, etc. They told me the Spectrum had dominated. Then I went in there with an Excalibur and later an Explorer and found many targets they had missed. I think they may have gotten deeper, but I was finding coins and buttons that were mingled very close to nails. But I do not know if I was getting as deep as those guys. Skill, soil moisture, sun spots....who knows...
So, yes you are right, that there is no 1 machine to dominate any site. If you think you know of 1, I assure you, I can prove it doesn't.
BTW, there are already places that have (and have had for a while) the TDI for sale, but thanks to this nonsense regional buying scheme that White's has, you can't buy them. You have to get them from your region's distributor. While I understand the service side of things, if you are selling a product, this is crazy.
For every retailer that I have overseen, when we were out of something, we transferred or sourced it from another location that had it, OR we referred the customer to that location. You know why? You don't want to lose the sale and have the customer buy from a competitor.
I know I will get flack saying the scheme is a benefit or perk for that dealer. But, if you lose the sale to a competetitor, no only did you lose the initial sale, you also lost any future revenue stream for post-warranty repairs and upgrades.
JMO, Scott