To complete this thread, I did get the used Polk Audio Monitor 70s to replace my old Bose 2.2s. Got the Polks for $180, near mint condition.
I’m really amazed how well this old receiver drives these large speakers which sound great for Polk’s lower end line. Of course they sound way better than the Bose. Now I will enjoy listening to music down at the cabin a lot more.
But, I have no plans to run them and the Bose at the same time. However, I probably will keep the Bose down there and put them on the porch when the weather is nice.