If there is any VLF that would challenge the SDC then my pick would be the Eureka Gold. If you are detecting and come across some hot ground at least you can drop down form 60 khz to 20 khz and still find some extremely small gold. With the 6" coiltek on the eureka gold would have to be a killer on small gold in the 60, 20 khz settings. The price of the Eureka Gold is selling for at the moment is really good value considering the dollar has fallen causing the gold bug and GMT to rise in price. You definitely get more bang for your buck with the Eureka gold.
Just my thoughts anyway.
Just my thoughts anyway.