Damn BB, you never cease to impress with your finds! Glad to hear that your NOX 700 is kicking butt, and I think you may have taught me a valuable lesson as well.
I've been swinging a Minelab Sovereign Elite with 12x10 & 15x12 SEF Butterfly coils for the last 16 or so years, and early last year, I picked up an X-Terra Elite to have as a backup and also for land hunting/coinshooting. After I got the X-Terra, I was fortunate to pick up a Dual Field PI that OBN previously owned & modded. But since I'm a simple old school, audio only, twist the knobs kinda guy, I think I only have about an hour or two on land with my X-Terra, haven't tried it on the beach yet as I always instinctively reach for my Sovereign & DF PI when hitting the beach.
When I bought the X-Terra Elite, I also looked at the 700, 900 & Manticore, could have bought either one. I knew the Manti was Minelab's new top-of-the-line detector, but as a simple, knob twister guy, I guess I didn't want to put my brain through the learning curve to figure that one out, lol. So, it was down to the X-Terra, 700 & 900. But while comparing the X-Terra Elite, 700 & 900, I noticed the vast majority of specs for all 3 were identical. The only differences I saw were in "features", like the X-Terra & 700's sensitivity goes to 25, but on the 900 it goes to 28. I never run sensitivity full out, so I wouldn't use those extra 3 levels. And the cost of coils for the 700 & 900 are twice the price of X-Terra's ($250 vs $125), so there's probably something going on there. There were a few other features where the 900 had more expanded ranges than the 700, which had more than the X-Terra, but I like simple so I went with the X-Terra Elite, as it was the simplest of them all.
I guess I've been using my Sovereign for so long that I'm a bit stuck in my ways. The Dual Field PI is a different beast, so I have no problem ditching the Sovereign for the Dual Field when hunting the wet and shallow water, that is, only after I run my Sovereign over the wet first, to determine if there's a lot of iron present. If so, I'll continue using my Sov. But if there's not a lot of iron, I'll swap for the PI. I've just been having a psychological problem putting the Sov & DF down to give the X-Terra a try. But based on your comments, maybe I've been missing out and need to force myself to run that X-Terra Elite over the wet and in shallow water, see how it performs. And since my Sovereign isn't waterproof, I have to be really careful when taking it into shallow water, but the X-Terra is fully waterproof, along with my Dual Field, so if I used the X-Terra along with my DF PI, I wouldn't have to worry about either of them getting dunked or when hunting in the rain. Looks like I'm gonna have to force myself to start using the X-Terra Elite. Hopefully, I'll have a similar experience to you and will be pleasantly surprised.