I've been riding a Trek 7500 hybrid since 1998. I wanted to move up to something lighter and faster. After discussions and measurements with my LBS, I've ordered a 2010 Madone 4.5 to test. One problem I'm having while waiting for the bike to come in is that there is relatively little information online about this model. There are plenty of reviews and discussions about the 5 and 6 Series Madones, but very little about the 4 Series. (I should mention that this includes both the Trek road bike catalog, AND the Madone-specific catalog, as well as Trek's web site and other web sources.) I'm wondering if it's a good choice, since it's the lowest Madone model and has the lowest-quality frame and component specs of all the Madones. Is it better to get a low-end Madone, or would a high-end 1 or 2 Series aluminum frame bike be a better choice? The best thing about this is that the LBS owner says if I don't like the bike, I don't have to buy it. I'd love some opinions about this. Thanks!