Hope it sounds great with the wa22!! I have a wa22 getting repaired atm, so one day I will know how that sounds as well.I've just picked up a WA22 which I had no intention of using with my Empyrean, but i've read a few times now that tubes and Empy's are great.
Just need to pickup a single ended cable (mine came with XLR). I'm going to assume the Meze silver cable would work best here considering the tube pairing?
I've been using a after market silver cable with the empyrean's and it works well with the tube amps. Helps to balance out the sound. I still like a warm sound though.