I appreciate that one's budget is directly correlated to the content of one's wallet. For someone who has been a casual rider, and (after a few bike-a-thons) is looking to buy his first road bike, am I crazy to spend $4k? I am looking at a Serotta 2009 CDA. Will I likely after 6 mos regret not having spent half the amount because I didn't know what I didn't know? Am I on the righteous path or about to learn the hard way?