I want to race my road bike in time trials and am looking for some clip-on aero bars. I know this can get as involved as I want with position, fit, etc., etc., but I'm no contender, just want something that will get me a couple miles per hour more. Any recommendations on entry level bars - pros and cons? I'm leaning toward the Profile Airstryke 2000. Here again I realize there are lots of opinions and preferences, but if anyone knows of something to definitely avoid or definitely get, that's what I'm looking for. Thanks! Mark U.