I am using the IRO BB on my IRO with a set of Dura Ace track cranks, works perfectly. The 110mm width is perfect for the older Dura Ace as well as the Sugino 75 cranks, I have tried both. I wanted something sealed, as the bike is my cruiser, and I wanted something low maintenance. The IRD one looks good as well, although I think I didnt buy it cause one of the cups was plastic, like the Shimano's, but dont quote me on that.

But a few miles on the IRO BB, and its nice and smooth.