I've had two custom bikes built for me - build quality for each was superb. One carbon and 1 Ti. Both were great riding bikes that fit well, but, both were stiffer than this old guy wanted.

Don't have either one anymore - expense for this lesson was great.

Now riding a used Serotta Ti that I bought for a great price - it's a wonderful bike that is just right for this guy - no longer in search of the perfect bike.

YMMV.