Is anyone out there among us 50+ers using a compact crankset? I am just starting the process of building up a carbon fiber frame I bought and need to decide whether to use a compact crankset with 50/34T or a triple with 52/39/30T. My current road bike is a triple, but I don't often use the top-end gears on the big ring. I DO sometimes use the bottom two gears on the small ring (especially the next-to-bottom gear), for example, when doing the Mt. Rainier climb up to Sunrise. My LBS guy is recommending the compact crankset for the clean, crisp shifting and weight savings. When finished with the build-up, this will not be my long-distance bike but my FAST bike for races. I would be using a Shimano Ultegra 10 rear cassette. Anyone out there have any experience/ideas about the compact crankset, what I'd be giving up on the low end?