What are the notable differences between the 3 lines? I am very familiar w/the CAAD (own a CAAD8-6) and Super6 series but where does the alum and carbon fiber Synapse line fit into the Cannondale picture?

It seems like the Synapse line is priced better than the other two lines?

Would I have been better off w/something in the Synapse line vs a CAAD8?

Id like to upgrade to a Super 6 bike but should I consider a Synapse? Pros/cons?

Thanks.