My problem with flex was as I described it earlier with the chain rubbing the derailleur during hard sprints and standing on it over short hills. But I have no particular prejudice to any frame material only to how it works in a more modern setting for club rides and centuries. As I research this more I am beginning to feel like I am getting buried by choices.

As an aside I also am beginning to see why bicycle manufacturing moved off shore. Domestic frames are way more expensive than I thought and some of them take forever to ship. Just an observation.