I think your yammy would probably be fine with 80's. Older Yammy's had issues, but I think you would be just fine. Axiom has certain brands of AVR's they promote from previous experiments. Many people have had no issues driving 80's.

If you decide to go with 60's, you will also be very happy, trust me. \:\)

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85