One other thing. I've been riding for about three years, have a 2004 Trek 2100 right now. I'll never race, but love to ride in charity events like MS150 and what not. Right just about everyday after work, 20 to 30 miles and longer rides on the weekends, but like I said I have no desire to race, just love to ride. With that being said are the differences more along the lines of something that racers would notice and benefit from?