I finally got the speakers here. I'm just running the Quads right now, no gradient subs yet, with the Levinson 432. So far, so good. In fact, they sound excellent. I'm putting a decent amount of volume in them (I'm in an apartment so I never get really really loud), and they sound much more dynamic than the 'internet chatter' had led me to believe they would. Makes me think that some people comment on things they've never actually heard..wait, that never happens! 
I also borrowed a Quad 606 amp that I may give a shot, too. But I think the Levinson is going to be ok here.
I also borrowed a Quad 606 amp that I may give a shot, too. But I think the Levinson is going to be ok here.