Our experiences are pretty very similar. Six years ago I bought the AT Pro. Fine machine, very easy to use, will find stuff and the best customer service I have experienced. After three years in Mar 2018 got caught up in the Equinox hype and sold the AT Pro and bought the Nox 800.
I made a big mistake with using the Nox. I tried to use every feature on the machine with not really knowing what I was doing. So 90% of the time probably in the 1st year was using a detuned machine. Should have just stayed in park 1 or 2 or field 1 or2.
But even after I learned it, it was picking up way too much trash, especially small trash. Cut back the sensitivity and there went the depth. I know the 800 is a very good machine, but just not for me in urban Atlanta that is super trashy.
Was advised by several forum members I trust to go to the CTX3030. What? go backwards to a machine introduced in 2012? They convinced me and I have been a happy puppy ever since. I have had it 30 days now. Found my first Civil War bullet, a silver dime and several wheaties. Lots to love about the CTX. FE-CO color display, ease of making patterns and audio tone ID's with Xchange2, finally a depth meter that is pretty darn accurate and tells you the depth in inches and not bars that are approximate if that. Collapsing shaft with cables inside that is a huge time saver for me. FE-CO color display that target trace almost makes it like a little underground radar. I deal with the weight issue with the Minelab swing harness. I have total confidence with the CTX producing for me in my trashy urban hunting areas.
There is one super trashy park near my home that is full of screw caps and other bits trash like zipper pulls that fools the CTX into thinking they are coins. I am not sure any detector can tell the difference on those problem items. The worst are the Pepsi screw caps. And I cannot go by depth since they are anywhere from 12 inches deep to 3" inches deep.
Maybe we can keep this sub-forum for the CTX alive. You are right, lots very good stuff here if you go back some. Lots of good videos. Andy's books is good on the CTX. Not so good his book on the Equinox. I am waiting for my Clive Clynick book on the CTX. It seems to be lost in the Christmas rush, ordered it two weeks ago. Clive's books on the Equinox were very good. Also almost anything your read about the E-trac it you can apply to the CTX.