Assuming this to be a "dream" bike, I'd advise checking the "master" builders - people with decades (not just years) of experience: Richard Sachs, Peter Weigle, Mark Nobilette, Bruce Gordon, Bernie Mikkelsen, Albert Eisentraut (tho' I've heard Albert has retired), Jeff Lyon, Mark DiNucci. These guys have been building since the 70's, and by and large their frames are expensive and they have long wait lists, but IMO the end product is worth the investment. They know what works and why (and maybe more importantly, what DOESN'T work), and their work is characterized by little, often unnoticed, details that really separate their bikes from the merely excellent ones.

SP
Bend, OR