my room is 12x15x8 sometimes the bass can overpower a little but the sound is to die for. right now i looking into upgrading the preamp and maybe adding a dac.
I have found the Atma-Sphere to out perform the Quicksilver in every respect, faster, greater dynamics, low level detail and low frequency texture is far better, more holographic. The Quicksilver is nice but IMHO, no match. Usher (your speakers?)claim 87dB sensitivity, with (nominal) impedance of 8 ohms. I would only caution that you check to make sure they do not drop below 8 ohms as that could be a problem for OTLs. You must audition these amps, if possible. Take a listen and you will hear what I mean.
