The 5.2 is a great bike, I would have went that route but I was just getting back into cycling and was not sure if I would really keep up the miles. I didn't want to spend the money on a CF and then find out I was only riding 1-2 days a week. As with most people I am lusting for a new bike now. With that said my 105 components work great, the only upgrade I made was to put on a set of Mavix CP-33 wheels with Dura Ace hub and Ultegra cassette. A friend gave these to me. I also use the 105 SPD-SL pedals and have found these very easy to get in and out of and the cleats have lasted me 5000 miles so far.
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The problem with the gene pool is that there is no lifeguard and the shallow end is much too large
2013 Noah RS