First off, thanks everybody for the great advice.

I went down to my lbs just now and spoke to the fellas there. I didn't get my bike from there. Anyway, the fellas had a good look at my rear wheel, and told me they've just had another guy in on fri morning with same wheels bought somewhere else, which are out of true in two weeks plus.

Diagnosis from them was most probably like y'all said, not tensioned or trued properly, so they offered a rebuild and/or a good price for some aksiums if i wanted some.
Also, they told me basically if i had to choose a new mavic wheel, to either get aksiums on a budget, or skip the equippe to the elite. Difference between the aksiums and equippes not really worth the price difference they thought.

I bought the aksiums, and got them sorted. I'm gonna also get the alex ones rebuilt or tensioned and keep em as a spare. Just got em mounted on the bike, but can't give it a ride cos it bloody started snowing!

much appreciated all..