Been using the Nox quite a bit lately but I definitely would never sell my CTX, it's still king. I wish they would combine features of the two and make a Nox 3030 with the CTX's very accurate ID, trigger pinpoint, gps and waypoint functions, and the ability to edit all settings on the PC and save it to the machine. The jumpy ID on the Nox drives me nuts. With the CTX if it's 12/43 you got a penny, 12/44 clad dime, 13/45 SILVER! On the Nox you pretty much just have to dig anything thats jumping around above 24 and see what it is when you dig it out whether it ends up being clad dime, silver dime, fat aluminum bottlecap, or hunk of copper. Very rarely will I get a silver dime over 5" that locks onto 27 and stays there.