As others have said, a very subjective question, and the most objective answer I can try to offer is this link: http://desperadocycles.com/The_Lowdo...per_Tubing.htm

There are quite a few statistics in there comparing the wall thickness, butting, weight, and weight recommendations for most of the big tube makers (Reynolds, Columbus, Tange, Ishiwata, etc.) The one that I haven't seen mentioned is Fuji's Valite quad-butted, and I'm not sure how that stacks up.

My favorite is a frame that fits me and isn't too heavy. So far my best experiences have been Reynolds 531DB and Tange #2. How's that for a subjective answer?