The Ace 250 works in the dry stuff. Don't push too far into the wet salt sand with this 1. The Excal 1000 works well in the surf(especially trashy surf), fresh water lakes (awesome) and wet sand and apparently parks (see David of Suffolk's posts). The Garrett Sea Hunter Mark II works in wet sand and in the surf, but does not discriminate, which in the surf is ok, because most lighter weight targets gather somewhat near the waters edge. I don't know about anything else, except what I have heard as hearsay. If you do not want to go into the water, then you should ask someone else. That's about all I know. Hope this helps your decision. GH