I am going to search a bunch of cleared lots that had late 60s-early 70s houses that were flooded in 2001. The flood control bought the lots and demo'd the houses and cleared the lots in 2005. So the houses only had about 30 years of use. It was a decent neighborhood so there might be some lost jewelry and of course clad. I rarely search demo lots, hunting mostly parks and schoolyards. I plan on bringing the F5- 9inch Teardrop and another coil/rod. Which would be better... the Magic 5X8DD or the Fisher 11DD?