I'm finally ready to buy a road bike after having been a glutton for punishment... I rode my Gary Fisher mountain bike (with slicks) during the MS 150 twice. The hills near/in Austin just about killed me. I have one bum knee that gives me trouble from time to time, and I've heard that a "triple" would help with that on those pesky hills. I've been looking at the Trek Lexa S & SL Triple WSD bikes. I've been unable to find many reviews, however. All I know for certain is that a 47 cm is a good fit (I'm 5'2"). I can't afford carbon so I'll have to settle for a carbon seat/fork based on what I've read. I'll be using the bike I get for the MS 150, training, general exercise...etc. Any brand/model suggestions? I'd love to hear from people who are avid cyclists. Thanks so much!