I've experimented a bit with simcoe in my last couple of IPA's, the piney'ness didnt really cut through the fruity citrus of the other hops(Citra, Cascade, Centennial, Amarillo), either I was too shy with the Simcoe or used it at the wrong times?
I haven't used Columbus and Chinook, but they sound like what I need. A Simcoe, Columbus, Chinook combo might be the go.