Have you tried to replicate the noise by bouncing the car at home? If you can replicate the noise then you can get someone underneath to look at it.
Check your LCA bolts are all tight and your balljoints aren't loose or have excessive play, make sure the balljoint boots aren't split.
Check the steering rack is bolted up tight and no movement through that.
Is there a whirring sort of noise at cruising speeds also? If so check your wheel bearings by jacking up the car and grab the wheel top and bottom and see if you can wobble it at all, try grabbing it on the sides and wobbling it that way too. If there is any play they need replacing, which are the bearings you were quoted on, and no they are not part of the strut assembly.