I have been riding a pretty beat up road bike for the past 3 years or so. It was my beginner bike and was great. Now I'm looking to get a new bike...still not keen on spending 1K. I would like to stay between $500 and $700 if possible (fingers crossed). I am a weekend rider. Maybe 40miles a week. I am short! 5'4'' with a short torso. In the summer months I do do the occasional century or sprint tri. Any suggestions!