I live in Wisconsin also and have used many different detectors here and presently use the Shadow X5, explorer, Fisher CZ3D and a MXT. The soil here varies very much as far as mineralization from south to north with the south generally the least mineralization (near neutral in some places) to very much higher mineralization in the far north. Most of my hunting is done in the central to south portions of the state. In central and south WI I have found coins as deep as 10-11"'s with the X5 and Explorer and 9-10"'s with the CZ and MXT. I have at least 3 different coils for each of my machines. I don't hunt the far north but some of my buddies hunt there a lot and the indian copper they find is very deep 15+ inches and they find some awful small pieces at that depth with the X5, explorer, MXT and the minelab gold machines. I guess I would just say that for Wisconsin hunting you should have a detector that can handle some high mineralization. I won't get into brands here but there are a couple of brands that just don't do well in hot ground with any of their units. I also go to Northern Virginia twice a year to hunt in the hottest soil I've ever seen and my units all work well there. ArtWI