Last season I ran a pair of Mavic Open Pro/Dura-Ace wheels with Stan's and Vittoria XG tyres.
I have just splashed out on some new wheels and bought some Mavic Ksyrium SL Premium's (I also have a pair of these on my road bike) and will use the Open Pro/DA for training.
I am going to run these again with Stan's but with the new XM tyres, as I feel with more grip I could ride with more confidence.
But, and this is what my question is, should I have bought another pair of Open Pro/Dura-Ace wheels instead so I have two pairs the same but with different treads on?
Or were the lighter/stiffer Ksyrium's a good investment?