Your Yammi won't have a problem driving the 60s or 80s. And you'll be able to drive the Axioms louder than the 701s with less power. Be prepared for better imaging, wider soundstage, improved clarity and more realistic lows/mids/highs with the Axioms vs. the 701s. I used to have the 601 series IIs prior to the Axioms. That was the last great speaker that Bose made by the way. Oh, and you'll be passing the Axioms down to your great-grandchildren where the Boses last 10 or 15 years at the most before you need to replace the foam surrounds and possibly even the drivers if you are in a humid environment.
