I just got a second bike to act as a backup bike/warm weather bike, and I went with a vintage steel road bike with drop bars. One thing that I would caution- the geometry of these old road bikes is more aggressive, and combining that with the drop bars, creates a bit of a learning curve, even if you are used to riding your hybrid. I find that the steering on my new bike is very sensitive, and I've wobbled a bit when doing shoulder checks, and starting and stopping. I am not confident enough yet in traffic to properly signal, and I basically am avoiding gear changes until I get more comfortable. I sort of wish that I had chosen a second bike with a more relaxed/upright geometry for riding in traffic, but I'm going to keep riding this bike for a few more weeks to see if I get used to the handling.
If I were doing it over again...which I might be, depending on how the next few weeks go, I would look for a vintage steel mountain bike (one without the suspension). You can set those up with smoother tires, and the geometry is similar to a hybrid. Plus they are usually pretty cheap.
Another option would be early 90s hybrids, like the Trek 750 that you linked to. Although, that one looked overpriced to me.
Looking in your area, here are options to consider:
http://minneapolis.craigslist.org/ram/bik/4423011288.htmlhttp://minneapolis.craigslist.org/hnp/bik/4430608880.htmlhttp://minneapolis.craigslist.org/ram/bik/4431731918.htmlWhatever you decide, make sure to try out shifting, braking, signaling, and shoulder checking on a test ride of the bike, so you can assess handling as well as fit & feel.
Of course, if you are planning to get into long road rides, feel free to completely ignore this :)