My 2011 Felt Z4 has been a comfortable bike for 2 years and I've really liked it, but in the last few months I haven't been as comfortable on it as on my Litespeed. I swapped this, measured and adjusted that, etc. but to no avail.
So tomorrow I'm test riding a few Cannondales - CAAD 10 and Synapse -- to see if we'll be happy.
Wish me luck.