I have been deliberating on these 2 detectors and decided to buy the Sea hunter MarkII since this will be my first water detector. After looking at the price of the Infinium and then having to put out another $85.00 for a pair of waterproof headphones, and then having to spend another $50-$130 for a straight shaft to solve a 4 year old problem, I felt I could not go wrong. Maybe hit a few rings then the detector is paid off. I do not understand why this wobby lower unit has not be addressed by Garrett. What do you think? Thanks for all the input. Marty