TO ALL... I sorted out the beater bike! So I would be going for the two bike approach... So between the 3 models mentioned above in the OP, which would be your pick for recreational and exercising purposes. My intentions for this road bike would be to ride for hours on end, day rdes, canyon rides, group rides. Miles would very from fast & furious rides to burn some calories to long and steady 30-40+ mile rides (to begin with and increase my endurance).
-Cannondale Supersix 5 105
-Cannondale Synapse Carbon 6 Apex
-Cannondale Caad 10 5 105