Im still one of those that DONT feel they make that big difference in depth. I use mine and yes if something comes along better, hasnt yet, i would trade up. I like to keep my detectors in as good a condition as possible..... Old school military i guess. If i buy a used detector i dont want one that gives me reason to beleave it might not work properly or might be one hunt from needing to be sent in for repairs. Dont know why, but the minelab dont hold their resale as well as say a whites so i like to get as much as possible in trade. Also coils are expensive and they get enough banging around. Its a pain removing the cover and it doesnt take much under the cover to affect the reading or cause falseing. If you have ever hunted on a beach out out west you know what im taking about with sand and water. Mine comes off so much easier than the whites i used to use so i do it as a habit before i start. The covers are cheap protection.... hey, but i also clean mine after use, tape handles, cover the box, and wrap wires.... just me maybe.
Dew