I just hunted a house today that was near an old fairground.I hammered the front yard about 15 times with both an xlt and a Cz7apro.Last three times there I found nothing.No the site had produced a lot of old coins,so I was dogging evry positive signal with the fisher and the xlt.Had a few hours to play today,so I tried the site with my DFX.Front lawn is onlt about 100 feet by a 100 feet wide.I found 4 wheaties,all down about 9-10",a nickel down about 9",4 keys,down about 8-10" a small kids braclet,down about 6" and a lot of foil and other trash targets like pull tabs and what not.I can't beleive I missed all that with the xlt.There are still a lot more signals there that I didn't have time to dig.I NEVER dug a penny or a nickel at 10" with the xlt.Maybe 6" was about the deepest.There is NO comparison between the two machines.I've had pretty much the same result on all the sites i've gone back to.I bought a spectrum/xlt in 91 when they came out and used it up until 2000 when the dfx came out.I have another site that two of us hit good with an xlt.Was an old farm house,lawn was about 30 ft by 60 ft.We pulled about two or three wheaty's from it.Went back with the dfx and couldn't believe everything I missed with the xlt.Found about 20 IH's,6 Barber dimes,3 barber quarters,2 large cents,5 V nickels,2 Standing liberty quarters,several tokens and 3 dog tags from the early 1900's.All the targets were deep,6-10" and the site had a lot of iron.The xlt just doesn't go that deep,not even close.I would say at maximum it will only pick a nickel up half as deep as the dfx will.As for saltwater beaches,the dfx will most likely go about three times deeper.It's definately worth the extra money.Dave