I think the cyclocross bike would be your best bet, because of its versatility. The Surly
Cross Check is worth considering; it's a little over your price range but it's sturdy and well equipped. I have a personal preference for bar end shifters, too, which the Surly has. Almost any local bike shop can order a Cross Check, because Surly is owned by Quality Bicycle Parts, the major parts wholesaler in the USA. However, Surly's website lists dealers who specialize in their bikes. I own a Long Haul Trucker, also from Surly, and I like it very much.