best amp for BASS

Thanks for the inputs.I do use balanced connectors.The bass is very clean not boomey but not powerful.My guess is that having a large room with very few walls(the size was describing floor not the enclosing walls) will require lots of current with fast rise time,and large power supplies.I agree the best approach is auditioning different amps.However this is difficult if you do not want to pay retail and you are buying on audiogon.I did hear the Loreley speaker with Crown amps,definitly inferior to Bryston.I do not like the Krell amps for their highs and mids,but maybe for the bass they will be good what about the FBA600c?
Thanks for the responses.

I must apologize to those of you who responded to my question and to Bryston.When the dealer installed my meridian(the meridians installation are beyond me and most older hobbiest) and the bryston he set the amplifier with the wrong gain,on ballanced inputs it had the low gain ie 100watts @8 ohms instead of 500 watts@8 ohms.What a difference it made the system sounds great.Bryston thpough is not totally blameless it doid not provide a manual for the 14Bsst,only after downloading from the web did I discover the set up error.I do appreciate all of your inputs,Someday I may try the Krell 600 or 700fba I have a hard time placing a n amplifier which is deeper than 24".
Thank you