Unfortunately (or fortunately, depending on where you are coming from), I have not been able to find a speaker that outperforms the AA's for $500 or less.
Here are more comments on this including a direct comparison of the AA's against the Ascend CMT-340:
http://forums.audioholics.com/forums/threads/which-speakers-do-you-like-better-why.104627/page-2#post-1148161
Despite the specifications showing equivalent bass (which are likely done using different methods), the AA's unquestionably offer deeper bass. That was a surprise as the size of the 340's along with the dual 6.5" drivers led me to expect more bass from the 340's.