Depends on how loud you will be listening. The Axiom speakers are very efficient if you look at the specs, and don't require many watts to play very loud in most rooms. 80w should give you enough to play at moderate to loud levels, and enough extra for dynamic peaks in music/movies.

What receiver are you considering?

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