I'm about to finish my second AMP-10b. I will use the two for bi-amping my main speakers; one AMP-10b will do the woofers, the other the tweeters. I will build an active crossover for this.
In the future, when I will have time, I'd like to integrate the system with a pair of "rear" speakers that I already own, and then a central speaker too. I have an AMP-5 at home back in Italy sitting in the garage; I might use that; how would you integrate it in the system? Maybe use the AMP-5 for the woofers, and the two AMP-10b's for the frontal tweeters and rear speakers? What about the central, I am not sure which AMP-* I should use for it, as it would be a mono speaker.