I have 2 70's and a 705. Have just bought the Nox 800 and have hard time weening off of the X-Terra. They have been real good to me since the beginning. Some have touted the Nox 800 is a replacement for the X-Terra, I see no compare to the X-Terras at this point. Keep in mind that I'm a strict old home place, CW Relic hunter and could care less about stepping foot in a city park. The 10.5 DD 18khz coil rules as far as I'm concerned.