If I needed a commuter, I would go for a cyclocross bike for sure. They seem to be the best if you want drop bars (which I would). Of the cyclocross bikes I've seen around the city, the Kona Jake looks marvellous and like it has an excellent component package for the price. A new one is in the $700 neighborhood, but maybe you can find an '07 or a lightly used one for less.

I don't think Specialized makes a tourer, and their cyclocross bike is way more expensive. Don't feel bad about trying another shop if your regular one just doesn't carry the brand you need.