I just got a new set of JBL BALBOA 30, 3 way floor speakers and they don't sound there best unless my little sony 50ish watt a channel is cranked. Even when its cranked, its not that loud. Anyway I have a set Bose 201s (to add to this 2 ch. system) on the way and need something with enough punch, to make them both loud and "good enough" at low levels. Any suggestions. I would consider cheap old/used ebay stuff to new stuff up to $500.