You could just get the Sugino XD2 500 triple crankset. If I am interpreting other posts correctly, it is cold-forged instead of hot-forged and already has the rings you want.

http://00eda5d.netsolhost.com/cranks.html

It really isn't clear why cold forged is better; but a bunch of old curmudgeon buds of mine seem to think that it is an advantage.