How does marantz typically do with the m80's?
It really depends on a variety of factors. How loud, how far a listening distance, pre-amp settings, source material, what other speakers are hooked up to a receiver? There are several conditions and a combination of which can lead to shutdown with the M80's.
Any receiver can power any speaker if you listen at lower to moderate levels in a small to medium sized room. The Marantz will be fine under those conditions. It is during loud and sustained listening sessions and perhaps demanding source material where you might run into problems. This is the same with every receiver brand.