Has anyone used the Parasound Zamp amplifier, Zpre2 preamp, or any of the other z-series components? How do they stack up as far as sound quality? I'm not looking for audiophile equipment, but I would like to be a notch above the Sony crowd in setting up a multi-room system. For example, in their price range I can also go with the Cambridge Audio stuff, but I would be giving up a lot of convenience such as size & 12v triggers. Any recommendations?