I'm trying to put a recipe together for a nice IPA to celebrate the end of summer. I'd like to experiment with some hops I haven't used much, so I'm going to try to avoid cascade, centennial, and Amarillo. I'm using Northern Brewers Super structure IPA extract, and I'll probably add a bit of extra crystal. Was thinking about bittering with Columbus, and then using either Horizon or Perle for the other additions. Anyone have any experience combining these hops or have any other ideas for some good hop combinations? Thanks!