If you in the market to buy a road bicycle, then now is the time to purchase a new one. You will get a lot more bang for your buck on a new model these days as opposed to attempting to purchase a used road bike.
Another reason to make a new purchase over a used one would be the warranty. This alone makes the difference in my opinion.
As far as the technical end is concerned, carbon road bikes vs. aluminum road bikes, there is an interesting technical article on the subject at xc-mountainbike.com -Carbon vs. Aluminum Bikes.
Number 1 Best Road Bike to Buy for Riders / Racers on a big budget
The Jamis Xenith Endura Sport is great bike choice to get into road biking. You get a high end carbon frame with excellent geometry, a solid Shimano drivetrain and a mix of FSA components.
The wheelset is on the low end of the scale, bu it is solid nevertheless and you can easily upgrade your road bike wheels when you get into the sport a bit more.
The bike is currently 20.44 pounds quite reasonable for a bike at this price, and with a wheelset upgrade in the future, expect to drop another 2 pounds.
$999 (44% Off) MSRP $1800
Number 2 Best Road Bike to Buy for Riders / Racers on a budget
Orbea is no slouch when it comes to road bike racing, and here is your opportunity to be able to throw a leg over some really decent equipment at a very affordable. price. It’s grouped with Shimano 105, which has a great reputation at this price point and Vision Team 30 clincher wheels, a great price and your overall road bike package only weighs 19 pounds. At this price, don;t mess around they will be gone in no time.
$1499.99 (52% Off) MSRP $3199
Number 3 Best Road Bike to Buy for Riders / Racers for around $2000
This Colnago is a custom collection edition and dialed in to perfection at truly great price. Enjoy a Shimano 105 drivetrain, Colnago Disc CXD26 wheels.
When you spend a little extra on a Colnago, you get 100% Japanese sourced Toray carbon fiber. Its the strongest and highest quality carbon fiber available.
At respectable weight of only 19.64 pounds at this quality level, consider this trusty road bike steed to get you up your next hill climb.
$1899 (44% Off) MSRP $3400
Number 4 Best Road Bike to Buy for Riders / Racers who want a bike heavily discounted down to $4K
This Colnago is a steal with SRAM Red ETAP upgrades. It also comes with the MAVIC KSYRIUM DISC wheelset, centerlock rotor mounting.
Colnago only uses 100% Japanese sourced Toray carbon fiber. Its the strongest and highest quality carbon fiber available. Many other bikes are cheaper, but you get a much lower quality frame.
At respectable weight of only 17.38 pounds at this quality level with disc bakes, this is a serious contender for your next road bike.
$3999 (38% Off) MSRP $6499
Number 5 Best Road Bike to Buy for Riders / Racers who are going for the podium, or who only by the best but still want a great deal on the latest technology.
Wow, a team bike at this price. If you blink, they will be gone. What does team mean, well to start off with you get the best of components available and ready for this, the bike weighs in at 15.9 pounds with disc brakes. Need I say more. Buy now if they have your size, or shed a tear when they are gone.