Oh, my, where to begin regarding those two! ANY IPA from either place rocks it, but, of course, Toppling Goliath reigns supreme. When in Decorah, there is also another brewery called Pulpit Rock, which makes equally good IPA's (it was a split from a partnership at TG, so in the same spirit as TG).
Singlespeed just gets better and better and owned by a state champ from New Hampton in 1993. Right now they are best at their IPA's and their sours. You really can't go wrong with any beer from them, but those are their two specialties right now. CF also has another brewery, but it's not very good, and the other great one we have/had, Lark Brewing in Waterloo, is looking for a new location.
As I said, I'm one of the good guys, so give me a holler if you're up here and want to meet for a beer (or one too many, as I usually do).
I’ve never had Pulpit Rock or SingleSpeed but go for TG every time I see it on tap. Maybe if Iowa ever wrestles UNI I will hit you up for a beer.