I am trying to decide which wheelset would suit me best - Campy Neutron or Campy Eurus. I generally do rides of around 30 miles, and enjoy gradients (in either direction). Some of the roads I ride on have less-than-perfect surfaces. I do around 22-23 mph (35 - 37 kph) on flats. Bearing these things in mind, what wheelset would suit me best? Also, would either one be a significant upgrade over what I currently use (2003 Mavic Cosmos)? I'm reasonably familiar with the theory about the pros and cons of low-profile vs. medium profile rims and conventional vs. non-conventional wheelsets and so on, but I'd be interested to hear practical opinions. All advice/comments appreciated. Also, any suggestions for other suitable wheelsets would be very welcome.