I am about to demo a cyrus 6 series combination and have been recommended to listen to it through system audio 1720 speakers. I've never heard of them, are they any good? Also want to listen to Epos M12.2, dynaudio, Monitor BR5 and RS5, and B&W 685. Any opinions on which of these would be best in a 3 by 5 metre room with the speakers either side of a tv close up to a wall? Price limit is around £600 new.