Boardman, Ksirium ssc, and SRAM Rival living in harmony?

retroboy
retroboy Posts: 9
edited March 2009 in Road beginners
From a previous life, I have a Cannondale CAAD5 which came with Mavic Cosmos basic wheel-set. It runs Shimano Ultegra 9sp, and works fine. In a moment of weakness i bought a mint pair of Mavic Ksirium SL SSC wheels. Beautiful. I took the cassette and the spacer from the freehub, and fitted it to the new Ksiriums. Fantastic, it works brilliantly. I havnt ridden in a while, and thought i would treat myself to a carbon steed. The Halfords/Boardman '09 Team carbon at £1000 looks a steal, and with 'ride-to-work' very affordable. Its known weakness seems to be the fitted wheelset. So, can I use my Mavic Ksiriums with a 10sp SRAM Rival set-up? Will I need a different spacer? if so, where would I get such a thing, and where would i get a duplicate of the spacer i alteady have so i can use my Cosmos wheelset again on my Cannondale? Any help greatly appreciated!
Thanks

Ian