Actually Bose is horrible but that's been touted more times than I can mention. As far another amp, Bose cube speakers were not designed to be used with any amp other than the Bose. The speakers most of the time run at about 2 ohms, and that will seriously damage and even destroy regular recievers, which were designed to handle 6-16ohm speakers.
I would ebay the speakers and use the money towards something else. My own mother tried to give me a Bose Acoustimass 15 system for free, I told her to give it to my brother....I hate my brother.