Cam, you'll be able to add whatever brand of speaker you want to the Axiom pre-amp as well.

I've never heard ARC but if it's anything like XT32, it's a good addition. I am hoping that Axiom and partners will at least make available a decent equalizer app for the Air. By decent I mean not like the Android EQ apps but more like the ones available for Windows.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated