Hey, I'm new to road biking, and was wondering if anyone could give me any information regarding the Cannondale CAAD3 and CAAD4 frames. Are they older frames, because all I find at the Cannondale website is CAAD5, 7, and 8. By the way I did ride BMX for about three years, so I'm not completely clueless when it comes to bikes, but there is a lot to learn about road bikes. Thanks