Well, what is the use of the road bike for? Is it more for 20 miles and over distance? Or is it for short, 5 miles pedal around the countryside?
I am assuming that the OP wants to do something similar to the Tour de France guys, so it would be 20 + miles type. This would require a road bike with gears on it. Fixed bikes would be pointless for that, as when you do distance rides, you need to change the gears to suit your energy levels. And also the terrain as well.
Go used, you'll get a much better deal that way. Plus, when you do buy a used bike, they often may or may not have better items on them that would be worth getting. For example, my road bike developed a kinked spoke. Which was annoying. This meant I had to trash that wheelset and get another, more expensive, but higher quality wheelset to replace that. Now the bike is actually pretty good and I am quite happy with it.
The higher priced bikes that you see retailing for insane amount of cash, are priced for their lightness and their efficiency of transmitting the power to the road. When you start off, you do not really need that expensive a bike as you *will* make errors and mistakes. Better to go for a lower priced, more used bike, so you can learn the craft required.
That Bianchi bike looks quite nice, a small tubed frame would help the weight. Only thing is, the wires for the brakes and gears may get in the way. Plus, give it a ride around and see how it is. Road bikes are stiff and will move around a lot until you get used to it... I do agree with p-coletray with other makes as they do good quality bikes are they are known for good price for the materials they used. Giant OCRs are rather usefully priced as well, they serve the triathlons well and the amateur racing group.