The single speeds are interesting; just be sure to try one out for a while. It's kind of a fad right now, so all the hipsters are building single speeds and fixed gears. They can be useful and fun, but they're an acquired taste; I'd ask to ride one for a day or two before investing in one. I intend to build one out of spare parts I have as soon as I can find a decent used frame; the city auction is this fall, and you can typically buy old road bikes (theft recoveries or abandoned bikes) for a couple of dollars. If they have any Raleighs or something similar I'll pick one up and play.

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)