From the web-site you provided, it looks like that Bianchi is carbon-fiber only in the rear-triangle area (i.e., the chainstays and the seatstays). My LBS stocks a lot of Specialized's and Trek's -- from their price tags it would appear that carbon / aluminum mix frames start appearing at about the price point you're looking at.

If you're looking for a full tip-to-tail carbon fiber bike -- I doubt you'll find much below $2,500