I've got a couple of the W. spey necks. I found that the bronze grade (though $ attractive) were pretty much worthless. Silver and gold grades seem to provide some pretty good spey hackle.
If you really want to try some neat spey hackle contact Ronn Lucas ( rlucas@cybcon.com ) . Ronn produces some custom dyed spey hackle that is really awesome. Check out his spey in the Atlantic area on FAOL