I currently ride a Cannondale SuperSix EVO with Fulcrum 5 Racing wheels. Which are fine, but I have been told an upgrade will make a big difference in the overall quality of my ride. Peak season I ride maybe a 100 miles per week, with an average speed of around 19mph. All my riding is done in and around the Seattle area, which is a mixture of rolling hills, flats and city. I don't commute on my bike, it is only used for recreational purposes.