Hello all! My name is Justin and I have been casually cycling in group rides and on trails for about a decade now, but have gotten more serious about road biking in the last six months. During that time, I have began riding with a group that challenges my abilities every time I ride with them. To keep up with them, I have modified my diet, lost 20 pounds, and begin running a few times per week to cross train, using a heart rate monitor for threshold training. my question involves my current bike. It is a 1998 Trek 470, which was an entry level road bike back then. It has an aluminum frame, chrome moly fork and quill stem, with Shimano RSX 7 speed components. I am considering purchasing a new bike, with a budget of 1500 dollars. I would like to know what you guys would consider my best purchase for that amount of money, and would also like to hear your thoughts about how a new bicycle will improve my performance and cycling experience. I will go ahead and state that the group I'm riding with currently average is 22 miles per hour over a 30 mile ride, with short periods of 25 or 26 miles per hour . I currently way 160 pounds, and I should state that my current bike is too big for me. Thanks, Justin