My 30th birthday is coming up and I was going to put money toward one of a couple options. Which one would you choose?

My current daily commuter/around town bike is a Centurion Dave Scott Ironman that is running as a 42/14 singlespeed with an 32h Open Pro wheelset. These are the options I was looking at.

1. LBS can remove the ultegra hub and install a formula hub, new spokes, cog and redished for $150. Basically convert the Centurion to fixed.
2. Order a Kilo TT from bikes direct $349 (my fiance likes this option the least only because I'd be stuffing ANOTHER bike into our apartment
3. Order one of the track wheelsets from bikesdirect.com $120-150
4. ??? open to suggestions.
5. Build my own and lose my mind with frustration.

I know the price range is all over the place, but I am trying to get an idea of which route some of the more experience cyclists out there would take.