The 606 maybe fine with the B&Ws, but not enough for the MAs: they're more Onkyo 875 territory, as we note in a sound advice letter on p76 of our current issue.
As I say, IMO, in your size of room, the Tannoys - which we pair with the Onkyo in our Best Buys section on p26 of the issue - would be a better match.