I've been told over the years that one machine can't do it all....lower freqs for coins, relics, etc....higher freqs for gold. Just read a review of the 800 in a treasure magazine, Sept. 2018 Western and Eastern Treasures. Rather impressed if it will do what it promises, and it looks like it might with the freq hopping available, and waterproof to 10 feet for either underwater work or if it accidently gets dropped in the water. Looks to be a great VLF unit at a nice price point. Kevin might have more insight into it, and possibly another choice. Bill might chime in here as well. I'm waiting for someone here to get one and see if it really is the cat's tail feathers of VLF, if so, will probably get one.
I use an older MXT and it is a compromise for all types of use, and have been repeatably been reminded that once you really learn it you won't be shortchanged. So far been happy with it, but don't get out enough to really learn it. True of any good unit though.