OK i am new but ready to jump in the water so to speak. Most of my hunting will be done on sand beaches. I really like the Treasurer Pro but when i saw a used M6 for sale at a good price i wondered which would serve my needs best. I am 60, pretty good with technology, but have not found much info on the M6, and my knowledge base is not deep enough to compare its older technology to the newer of the Pro. Help is needed................