To be honest, the WH-3 sounds like a transistor radio to me when I auditioned it. I sold my WH-2 because it wasnt that good on very loud surround sequences, bumibigay sya. But for average use, it was not bad.
Anyway, I read some THX guy say that they dont recommend spending so much for surrounds since its mostly for effects, etc etc. So the WH-2 is good enough. Because of space constraints, I recently bought a pair of Studio Acoustic (fr Daiichi) ceiling mounted speakers for my 6th and 7th channel. It was only about 2k.
But if you are into multi-channel music, thats a different matter.