How clean is the area of other iron where you will be looking for the balls? Having great depth is one thing, but if you are fooled by a ton of smaller iron then you will waste more of your time digging junk than looking. I never would have guessed it, but once I got really into wanting to find big iron I realized my explorer is a great tool for it. I can basically cherry pick the the high % iron hits and not be fooled by deep smaller stuff. Most of my older sites don't seem to have many large iron hits so it's great just digging a few, but knowing at the same time I'm not missing any because the sound for large iron is just too obvious. In the Fall I detected an undisturbed pasture and dug a 6 pounder at 3 feet... and it was definitely 3 feet. That's pretty good for a detector that's still using a small amount of discrimination. Had it been a large CW ball or shell who knows how deep it could have been. Even the 6 pounder was obvious, and I was pumped hearing the signal having been told just an hour before several balls were dug in the area. So I say depth is good, but time well spent is often better, and for a good iron getter you need both.