For that long of a commute, I'd recommend drop bars. That alone puts you in a cost dilemma, as you either end up with cheaper Barcon shifters, or lower end STI shifters (Tiagra or less at this price point). Tiagra is a pretty good spec these days though, FWIW.

The Fuji Cross bikes are pretty sweet, and if you have a local Fuji dealer you should see if they still have any old 2006 or 2007 bikes in stock, as they're a pretty good deal on clearance IIRC. It's worth a trip to the local Fuji shop at any rate. My LBS owner runs a Cross Pro, full ultegra: its a sweet ride for sure