It went through a few iterations:

STI:


Campy:


IGH:


The STI conversion was the cheapest because I already had most of the parts laying around. I just needed a new stem, bars, and some misc parts. The front shifting was never quite right though. The switch to Campy sounds worse than it was. If you're patient you can find NOS or used Campy shifters at pretty good prices. Those shifters eventually ended up on another bike.

The IGH was by far the most expensive but since this was my winter bike it was worth it. Eventually I moved everything over to an aluminum frame because rust started show up around the canti-posts and other places. I tried to stay on top of it but I decided I'd rather not deal with it anymore. At that point I put the flat bars back on and gave it to my son to ride to school. A few weeks later it was stolen.