I have both the 7125 and the 7500. The 7125 is out for repair at the moment. The 7500 has taken its place. My speakers are very efficient and to tell the truth I have not noticed a big improvement over the 7125. I bought the 7500 for my second home and plan on powering some less efficient speakers with it which is why I went with it to start. Indy, your speakers are very similar in efficiency to mine. The 7500 will likely be more power than you will ever use. It will only provide about 2db extra SPL and with 96db efficiency to start you will be deaf before the amp is maxxed out. Its transient response is similar to the 7125. Compare the specs between the 2 amps and you will likely be happy with the cheaper one.