9B-ST for Home Theater Amp


I am using an Acurus 125x5 for the home theater surround setup, but I think my speakers need something with more bass control. The "slam" that I like is just not there in the mid-bass and lower frequencies. Can I get that out of a Bryston 9B-ST? I have the 4B-ST for my separate audio system, and the thing rocks. I'm worried that with a 9B I'm basically just buying 5 3Bs. Anyone have any other recommendations aside from Bryston? I thought about waiting around for the new 6B-ST and combining it with a 4B-ST, but then of course I'd have to get a new amp for my audio system. Ahh, decisions, decisions. Input would be appreciated.
argent
So is the 9b a multi channel amp, because i am talking multi channel amps and sght,has no brystons near the top,only ead and aragon.The reason i need an amp to do both is iv'e heard the 4bst is not great with theils but other,and i am not talking levinson or krell amps can drive the big thiels with 100 watts rms, this tells me maybe bryston,s are maybe only good with easy to drive speakers.I am not hear to slam brystons,just asking if anyone compared earthquake or ead with one.This is not the kind of info you can find in a reveiw,so i am asking owners. A 20 year warranty,i could live without but great sonics on 2 and multi channel from the same amp,i can't.
Let me add my kudos for the 9B-ST...I bought one after hearing Emmett's (see first post above). He's my little brother, and I couldn't let him get the jump on me. I drive Thiel 1.5s with it, and am very satisfied. Just for the record, my factory spec sheet says the amp clips at 160 watts into 8 ohms. I assume that's one channel driven, but with independent power supplies for each channel, it shouldn't matter.