Does anyone here use an amp for plain at-home use? I play a PSR-9000 and as many of you know it has great built-in speakers. Yet, my guess is that the sound could only improve when you hook it to an amplifier. Am I right? I don't mean to up the volume just the quality (my condo association would frown if I cranked up the volume) What kind of amplifier would you recommend for at home? Preferabley I would like one without a built-in speaker with the ability to hook up two stereo speakers and a subwoofer. How much would that cost? Have any of you had any experience with wireless speakers? If so, which brands are good?

thx ev