I will be buying one of these two. The room is about 30m2 and will use Marantz 6004. Can u comment these speakers on loudness and bass, which one to take? Thank you.
Whichever speaker you go for, you'll be restricted by the power output of your 6004. Stay away from the loudness button, and don't add bass or treble and you'll make the most of its power output.
The RX2's would be my choice, not only for overall output, but also for punch and ultimate quality.
For me the RX2 was better than the BX5 (and 684's) in pretty much every respect. In particular the lower notes are massively clearer and better defined. I didn't try them with that amp....