Robert, Did you look at the MA Bronze line? I was just wondering because you can put together a Bronze system for about the same price. I have not be able to hear the Radius line as none of my local MA dealers stocks them. All I can say is I love my MA Silver system and know that MA and Marantz are a perfect match. There are no Axiom dealers anywhere near me so I can't comment on them. The only other small system I know that would sound good with the 7400 and is small is the Polk 6700 and 7200. Good luck.
I think the radius series is above the bronze but nt quite the silver. You pay more than the bronze but i believe the performance is superior ( ican't confirm this), the size is smaller and they are more attractive.
Robert - I have Axioms & recommend them highly. Suggestions, however: -Consider an upgrade to the Axiom M3ti or the M22 -Stay with the Hsu STF2 rather than the EP125