I am looking for advice on what kind of bike I should buy. I recently got into touring two years ago when I biked the Camino de Santiago in Spain with my brother. For the trip we bought Trek 520 touring bikes, but we planned the adventure as a type of credit-card tour for two reasons: I wasn't sure if the hostels would have enough room for us given that they provide for walkers first, and second, my brother and I are very competitive and we biked the whole way by road to maximize the distance traveled each day, particularly because we only had ten days to do it.
In the end, we carried only about 20 pounds in a single pack on a rack on the rear, but honestly, even that was more than we needed to bring. We are planning a road tour of the Alps this summer with a maximum of 15 pounds to carry and I'm thinking the Trek 520 is just far more robust than what we really need.
Also, last summer I started competing in road races at the cat 5 level with a friend's road bike, which I really enjoyed, I even won two of the races. This upcoming year I want to graduate to cat 4, but racing with my own bike.
So what I'm looking for is a road bike that I can compete in cat 4 races, but I can also use for my plans of a light credit-card tour of the alps this summer. A bike that can race with 700x25 or 23 tires, but I can swap out the rims and tires with 700x28. Also a bike that I can put a rear rack on to carry the light load I plan on taking when I tour. I've looked at a few, maybe you can tell me if they are good choices: The Specialized Roubaix and the Cervelo R3.
Thanks for any help,