If you are having trouble with false signals in trashy areas try turning down your sensitivity. Auto sensitivity is sometimes too hot, I sometimes drop down to 11 or 12 if I am falsing in trashy areas even with the Safari set too "high trash". Yes, the smaller coil will be better able to define your targets, as it will be less likely to see many targets at once. Some folks even go down to the little 5" or 6" coils if they coin shoot heavily trashed areas. I got a Sunray 8" for mine and it is great. The Minelab 800 actually measures at 7&1/2" so it is a little smaller. Also you will want to get another lower shaft to go with your smaller coil as it is a pain to thread that cable up inside the shaft every time you want to change coils. Normsel is right about experience, I am still learning my Safari, and it takes time and practice to figure out what it is telling you. Remember also that there is no detector which will find gold rings if you disc out pull tabs, just a fact of life. I mostly hunt "coins/jewelry" and dig the pull tab sounds, so as not to miss the chance for gold. If it's just coins you are after you can crank up the discrimination and you will not hit so much trash.