Nice post and bikes, there is a Cannondale synapse, what is the other one? Can't quite see it.
I cycle to work everyday, just over 20 miles, it has definitely kept me fit over the last year and a half. I wouldn't swap it for the world. Cycling is definitely one of the better ways to stay in shape it isn't high impact, it is free (obviously after you have paid for the bike) and it gets you out in the open air. This is why going to the gym has never really appealed to me.
I haven't done a century cycle yet but would definitely like to give it a shot.
Great piccies of New York by the way, the scale of the buildings are completely off the charts. Would be great to visit.
RE: Fitness, healthy living, and long bike rides!