Germantown is a great area. I've sold properties there and have family in the G-Town area.
However, I-41 and Appleton Avenue are easy avenues for some of the interesting problems just SE of G-Town in Milwaukee. Straight south, I can tell you that folks I know in Menomonee Falls and Butler (including some officers) are complaining of the same issues crossing over the county lines.
Not sure of your budget. Washington County (where Germantown is located) is getting expensive. Waukesha County (Menomonee Falls / "The Falls," Butler, and plenty more) has never been cheap. I'd recommend avoiding the SE corner/area of G-Town just to be farther from the trouble. It's NOT that Germantown itself is trouble; it's what crosses over the border. Other options include the Falls, Lannon, Sussex, Thiensville (in Ozaukee County), Lisbon, Hubertus, and Slinger. Butler will be the cheapest. Jackson has a pipeline burst nearly a decade ago with a lot of wells contaminated. I think that has been fully addressed, but it carries a stigma in some circles. If you have a better bank roll, Pewaukee, Lisbon, Mequon, Richfield, Colgate, Cedarburg, Brookfield, and Elm Grove might be options.
Where in AZ are you located? I lived in Gold Canyon off Kings Ranch and miss it out there.