Well, I finally pulled the trigger. When I test rode this bike I was not impressed. This was my first time on a carbon frame so I didn't know what to expect. This was the only bike I test rode. I wanted to try a Cervelo RS but I just couldn't find a 2011 model. Every time I flipped the coin it came up Cannondale. My last post here lamented the fact that my test ride revealed I could still feel the bumps. I didn't have an epic "magic carpet ride" experience I had read about in the reviews. Before I left the LBS I had them weigh the bike. 19 lbs. Slightly disappointed again. I got the Synapse 4 Indigo blue model. After 6 weeks on this bike I love it. The ride smooths out significantly when you get above 15 mph. Aksium wheels, FSA crank, and 20 year old Look pedals will be replaced for weigh savings. Hopefully, I can get it down to the 17 pound + or - range advertized. Any other weight savings tips?