I have a Zen amp with my Lascalas, I upgraded the coupling caps per Steve's recommendations. It is a great little amp, the highs and mid range are very accurate, the bass is a little soft on my system, but that might be because of the way I have my room set up - it is very small. I have since bought a Yamaha HT amp for movie watching and would consider selling my Zen, if you are interested email me.
JR