I'd say the 58" inch model might be 25 times to big for you ... but maybe you have long limbs and are really flexible.

CAAD12 is possibly the best aluminum frame every built (in my uninformed opinion, based on riding other C'dale products and talking with others who own same) and 105 is the perfect parts group--all the function for less cost (tastes great, less unfilling.)

I'd say the Giant (and I really like the old Defy upon which the Contend is based) is not even in the same league as the CAAD.

Hope it fits well and makes you happy.