Honestly........ the CTX is runs a lot better in the water. Advantage might be that the Nox gets open gold earrings and MAYBE some smaller pieces of gold. But its chatty on our hard pan..... you can reduce the sensitivity to quiet it, but then its already working at a reduced power. At that point... i think a lot of things become equal. I tend to dig a bit more small high conductors ... foil, can slaw, rivits, ect.
To answer your question...... yes you can set 5 bins with of course one being iron.... leaving you 4 to play with. I personally have my dimes and quarters in one bin. Heres how i have mine.... -9 to -1, 0 to 13 (nickel), 14 to 17, 18 to 21, 22 up. IMO..... im not looking for coins so it just doesnt matter.. i could put um all in one bin along with silver...... id still dig um. I will pass a shallow penny......21. The Nox doesnt have nearly the target tone adjustment either the CTX has. You get a lot of bleed off of minerals in the first or second bin when falsing which can make it hard to determine small non-conductors out there deep. Noise cancel..... well thats another think i just dont care for.... seems to be all over the place.
Its a better machine out of the water than the CTX thou for beach hunting..... well once you learn the bottle caps and if you want to find small gold at the expense of digging a LOT.... LOT of foil. Better id say in the wet sand too. Meet me one day on the beach...... ill let ya hear it run in the water. Its not for everyone thats for sure.