I have a NAD integrated 352 amp at 80 Watts. I have read some people who believe that it is worth the upgrade due to better bass and fuller sound. I have spied a 150 watt NAD for a decent price. Is this a trueism or another wive's tale?? I am driving m60's and I'm wondering how loud you really have to turn it up to notice a difference in sound. On my 352, I rarely turn it past 11 or 12:00 on the dial. That is plenty loud enough for me. I am about 11 feet from the speakers. Thanks........