More than a few on the Rivendell Owners Bunch (via Google Groups) are riding the San Marcos. When I was buying my Roadeo I thought of just getting the San Marcos but opted to spend the cash. I'm glad I did because I also got a custom paint job and the Roadeo is more in line with what I wanted out of a bike. Here is a thread I started when I was going through the decision making process over at Riv Bunch.... https://groups.google.com/forum/#!se...c/ymbX2TanLT0J

But anyway, the San Marcos is reputed to be a very good riding bike...much like other Riv bikes. They are very stable and much less twitchy than something like the Madone I used to have, They descend really well, turn intuitively; really comfortable bikes that you can ride for the entire day without feeling it in your bones and they last forever. Depending on what components you decide on, you can set the bike up to be a fast bike, or turn it into a hybridish bike...whatever floats your boat. I think Grant is missing out by not marketing one of his frames as a randonneuring specific bike. Here is their page on the San Marcos - http://www.rivbike.com/product-p/f-soma.htm