Sugino 75's can be had for anywhere from about $175 to $220 depending on where you look, and with or without a chainring. I was fortunate to get a good deal on Craigslist locally which is why I put 'em on.

Airbomb has em for about $175: http://store.airbomb.com/ItemDesc.asp?IC=CR1011

BikeWorks, $198: http://www.bikecult.com/works/parts.html#bb

Business Cycles: $194 http://www.businesscycles.com/trcomp.htm