I once had a maddening click on a Mavic wheel, although it was only the rear. I had two LBS look at it and what finally did the trick was when we flooded each nipple with lube. We also lubed the point where a couple spokes were overlapping and touching slightly under load (I'm about 190 lbs).
As a side note I was hit by a car a few weeks later which destroyed the bike and wheels, so I never did determine if the fix was permanent. FWIW the wheels on my new bike are Reynolds Aero 46 and they don't make any noise at all.
Good luck. Tracking down creaks, clicks. groans and pops can be maddening.