i have heard both the beethoven baby grands and the mozart grands. (i bot the beethovens). they r totally diff speakers sound wise and technically. the mozart is a 2.5 design w/diff crossover. i think the baby grands sound much better. however, the baby grands are very finicky about room placement, and if not set up correctly, u will get bass boom. yes, the impedance can drop pretty low on the beethovens, so b careful. i m not sure about your i-3. i have the i-5 and i really shud upgrade to a more powerful amp.