I have a Gunnar Sport also. Mine is tiny, 41cm. It was a custom geometry frame. Dreamy ride, but still a road bike.

The Cross Check is certainly a great do it all bike, especially if you want all the tire clearance it offers. I have a Motobecane Fantom CXX (from bikesdirect . com) that is basically the same frame as the Cross Check. The 42cm size fit me just fine.

The Surly Pacer, the road bike frame, is also very nice. Not as light and fast as most road bikes, but extremely comfy and bombproof. I'd light tour on a bike like that.

What size bike are you looking at? What is your budget?