How does the Nox compare to the Explorer series in terms of depth? I was a very proficient Explorer user and ran wide open, getting some great depth. I also heard a rumor that a certain major nationwide sporting goods store with a name that starts with a D and is a Minelab dealer has been known to honor their 20% off coupons on the Nox even though it’s on their list of non qualifying items for the coupon. Anyone here had any luck with this? Thanks for the replies.