The CAAD is a terrific bike but very racy, which might or might not be what you're looking for.
1. How much saddle to bar drop are you looking for?
2. Do you ride in the drops frequently?
3. Are you looking for a fast handling bike or a more stable bike?
4. What size tires are you thinking you'll run most frequently? You say you rarely ride any non-pavement surfaces, could that change for you?
5. Do you live in a hilly area? What kind of gearing do you need?
6. Will you be carrying stuff? Would you like the ability to mount racks or fenders?
In this price range, I would focus on practicality. Nothing proprietary or fancy. Threaded BSA BB preferably. Simple seatpost setup. Etc. Leave some money for a new pair of pedals. You might need to replace the stock saddle as well. OEM wheels in this price range generally are pretty unreliable and heavy, be prepared for needing an upgrade in a couple of years. There are lots of good options out there around $1,500.