Ok im glad you posted this topic cos I have the same symptoms except from the left front wheel. My car has been into the mechs about 2-3 times and they dont know what it is...
One thing I noticed is that if your decelerating the knock is there, but once you push the clutch in it disappears. Does yours do this? Ive noticed that the noise seems to be coming directly from the wheel area too
So you have had the CVs checked, and wheel bearings done.
Heres the list of things which mine is had in the front suspension in the last year or so:
New front shocks, new S/S lower arms, new sway bar links, new sway bar bushes, new LF ball joint (connecting strut to hub). So I can confidently say its none of them.
The only thing I can think of is maybe a wheel stud, or possibly the trailing arm (or whatever its called

). Seem to be the only things I haven't replaced
Its more of an annoying sound than anything but damn i want it gone!