a lot of people like:
http://www.bikesdirect.com/products/windsor/tourist.htm but an older used bike might bring you more value. Don't forget fenders on whatever you do. Also, bungee cargo nets come in handy lots of times in lots of ways. As do Wald folding baskets like this:
http://www.amazon.com/Wald-Folding-B.../dp/B000BPNK7O
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"