Cannondale F700! I am jealous. I used to have a Cannondale F7 (stolen in the states), and a Cannondale F500 (which I sold before moving here.) Now I have some piece of #$@% that I bought on mercado libre, but at least it is less likely to get stolen. Whatever you do with you Cannondale, don't lock it up outside here. A bike of that caliber will disappear quickly.
As far as the routes here, there is a "bikeway" that runs through the city, but it sometimes stops abruptly and it is difficult to find where it picks back up again. Also many cars park illegally on it which defeats its purpose. The eco reserve in Puerto Madero is fun to ride through, but not very long. The city is nice to ride through later at night with lights, or on the weekends when traffic isn't so severe. I don't know much about biking outside of capital, but I'm sure you can find some info on the forum. Good luck with your move.