I like wheels that a aero and strong, not necessarily light. I have shimano r550 which are quick and then bought some used kysrium elites which dont look as aero but are certainly more comfortable and more responsive to inputs and have a both flanges cross laced which I prefer to one side being radial like the r550. 600 is my limit. when you get basically the same designs as higher end just heavier. then again I've never ridden on expensive wheelsets.