As you can see I have an 800 and a Sea Hunter.
Got the 800 in Jan., have maybe 100 hours beach hunting with it. Was done with it after that. with the exception of one hurricane ravaged beach.
Had the Mark II since first month of production, whenever that was, it's spent a lot of time on the beach and made some great finds and dug even more junk.
Keep whichever one you like best. They're both good detectors.
With what you have now, I would not buy an 800, if I were you.
Other than the ability to hunt saltwater, your other two detectors are as good as or better than the 800 for upland detecting.
The 800 will hunt saltwater better than any other VLF detector but, it doesn't compare to a PI detector in salt water.
No VLF detector will give you the depth and stability of a PI detector.
If you want to get serious about salt water detecting, buy a PI detector.
By serious, I mean you are going to dig every target.
Look at the Garrett Sea Hunter:
https://www.garrett.com/hobbysite/hbby_sea_hunter_main_en.aspx
You can buy a new one for the low $600s or $700s with both coils or a used one for less.
Count on buying the 10X14 coil.
If you what to be a little more picky and not dig iron when you are beach hunting and don't mind losing stability and depth, then the 800 is a good choice.
Other than ferrous metals, good targets cover the full spectrum of positive numbers on a VLF detector when beach hunting.
I dig foil, bottle caps, pulltabs, tent pegs along with all the other junk with both detectors, I just dig it deeper, along with good targets with a PI detector.
So essentially you want to spend $899 on a detector + $239 on a big coil, that gives less than optimal performance for what you want to use it for, when you can buy something much better suited for your purpose for less.
Whatever beach detector you buy, get a big coil.
