Finally decided I am going to upgrade my wheels ready for spring. I had decided on the Mavic Kysrium Elite, priced at about £450 (depending how hard you search ) But I keep getting a little niggle in my head that wonders if its worth the extra cash upto about £700 ( again depending where you shop ) for the Kysrium SLS. Has anybody got any experience of either or both these wheels, and able to advise on whether or not the extra cash is worth the difference. Cheers fellas.