I personally don't know about the HSU sub, but I can't imagine you being disappointed with it from all the great reviews I have read.

I just got my M60s, VP150 and QS8s 2 weeks ago and they just keep sounding better every day. My SVS PB2-isd just arrived on Thursday to finish everything off.

I stuck in Finding Nemo this morning and played the Darla scene, it was hilarious. The kids were upstairs and thought it was an earthquake or something.

I know the sub is overkill in my basement (14 x 25 x 7.5) but I don't really care. It sounds great.

You should probably talk with HSU about their recommendation for your application. If you like it really loud, like close to reference levels then the larger sub will definitely give you more head room.

Remember that it's always easier to turn down the bigger sub than find out later that the small one can't hack it. Just my 2 cents.

Dave

M60s, VP150, QS8s(3), SVS PB12-isd, Denon 3805, Emotiva UPA-7