Try and keep your Crystal low Lovibond if you go high in Caramel. It's easy to go too dark. Amber is easily becoming one of the more popular craft brewz. I guess it's a personal preference. Add a little dark grain for that dunkleweizen.
Browns are a very diverse beer.
If there is ever abeer that should be brewed to ones taste, this is it. If you can't find any Perle just use more Hallertauer. Inc. All rights reserved.