You need to try Bell's Hopslam. Shit is great, incredibly hoppy. Bell's Two Hearted Ale is another good IPA.
I'm really into IPA's too... Big Sky IPA is a really solid, readily-available IPA (at least around here). It's just hard to recommend alot of microbrews because many aren't available across the nation.
Side note: I can't wait to have beermosa's tomorrow... got a brunch date. Beer + OJ = win. This place has a local brewery brew a special belgian white to use.