Hmm it really seems those remain the three main recommendations in that price range in spite of the lack of high pass filters.

I just wish I could read more on the AV123 X-sub and get some more feel for it from reviews. I know the HSU and Outlaw are both good subs.

Axiom M3Ti NAD C320BEE, C542, PP-2, Rega P2 w/ Denon DL110 Grado SR325 HT in the living room