The Legend has great factory programs that allows you to just turn it on and detect if that's what you want to do or it has settings that can be tweaked to what ever you want pretty much, it is the detector I would suggest, I also have the simplex plus and if you are detecting mild to moderate ground it is also another detector that is very good and is way more detector then its price point would suggest the simplex is a single frequency detector running 14Khz the simplex plus if you are detecting on highly mineralized ground I would not recommend purchasing because it is a very very chatty detector.
The Legend is a multi frequency detector running 4,10,15,20 and 40 Khz it can also run all those at single frequency, I have a few buddies that all use the Equinox 600 and 800s, The Legend and the Equinox 800 are very very close in capabilities, the Legend handles EMI a bit better then the Equinox and also does not false as much on nails as the Equinox, the build quality of the Legend also far exceeds the build quality of the Equinox, from what I have seen and compared to my buddies Noxes
The Legend is fairly new to the market and Nokta/Macro continues releasing updates to make it better and better, the most recent update in my opinion has pushed the Legend ahead of the Nox
there has been a few legend users that have had their speakers go out and Nokta/Macro is working on the issue
My suggestion if you do decide on the Legend go with the pro PAC which comes with a 11 inch coil and a 6 inch coil, wireless headphones and a battery back up the standard Legend PAC comes with the 11 inch coil and wireless headphones only,