After reading the post on this forum I decided to purchase the 5x10 coil. What a pleasant surprise to find out I could get one for 99.00 to my door. Coils for my explorer and sovereign were much more expensive. I realise the other two are multi freq. coils so its not fair to compare. But still less than I expected. Just so I'm not misinterpreted here I am not knocking the after market coils for the XS or sovereign. My only hesitation in buying the X-Terra was that I couldn't get one of Ralph's sun ray probes. Hopefully Minelab will wise up and realise that the sun ray accessories only enhance there detectors appeal.