The Bianchi Pista has a nice frame and the quickest handling of the ready mades.
The combination of a steep head tube (75 degrees) and minimal rake (28mm) makes for a bike that goes where you think before you think it.

The Pista has very cheap but well selected components.
Ride it for six months; discover what you like; start upgrading components, starting with the headset, the perhaps the wheels, then the bottom bracket, etc.

http://www.bianchiusa.com/06_pista.html