Just a heads up, Aperion is pretty much replacing their whole line beginning in like mid-march. Right now the 533 Towers in black are no longer being sold b/c they are out of stock. I believe they will be changing all the speakers with better tweeters and etc which will increase the price a little bit. Somebody in the "official" Aperion thread has a good breakdown of cost for a few their speakers.
I'm not sure if this change will happen all at once, but I believe its going to happen pretty quickly.