If you are into gold nugget hunting, the ORX is considered one of the best VLF machines on the market. Better than the Gold Bug 2, slightly better than Gold Monster. Handles highly mineralized ground very well. Also very good coin machine. Highly successful in Australia.
My reasons for buying the ORX was simple. I wanted the 9” X35 Coil and already had on hand both the HF Coils. So for a few hundred more I would get the whole unit. Good for a backup and my wife is showing interest in joining me at the beach lately.