I was all set to buy the Iro build kit that includes cranks, cog, chain, BB, etc for $135 until I noticed Airbomb has the RD48 for $58. I put the parts I need to duplicate Iro's kit in the shopping cart and it came up $10 cheaper (Sugino crank w/sugino BB, Surly cog, Dimension lockring, misc chain), with shipping only a couple bucks more than IRO. Total price ends up being about $6 cheaper than IRO after shipping.
What kept me from ordering was the fear that I'll have all sorts of problems getting the Sugino's chainline sorted out. I assume that the chainline with the Iro gear will work out since I would also be getting the wheelset from them as well. Is this a safe assumption or am I gambling with them as well?
Is the Sugino crank any better than the Iro to be worth bothering with it? With an entirely Iro drivetrain, is a proper chainline a sure thing?
Also, some of the stories I've heard about Airbomb give me pause as well.