I've got an Tandberg 3026A (150wpc)that I use to drive my main speakers (B&W602S2). I use a Rotel 6 channel amp strapped down to three for my center channel and rears. I am contemplating purchasing a 5 channel amp in the future, but was wondering what differences I would notice while listening to stereo sources with this potential upgrade. Would a newer amp be better or worse. The Tandberg's were high quality products of their time and amp technology doesn't change like what's happening in the preamp world.