I recently bought these for my 2 channel music room. I auditioned quite a few bookshelf speakers in the 500-700$ range (Paradigm Atom, Mini, B&W 685, Monitor Audio BR2, RX6, and a few others) and these came out on top. I initially picked the RX6 over this when I auditioned in the store, but the salesman asked to take both home and try them out and man what a world of difference, the Motion 4's really came to their own at home. I have a kinda smallish listening setup where I am not too far away from the speakers and they defnitely seem to benefit from speaker stands as well. The RX6 just sounding muddy, lacked seperation and really it was no contest except better bass on RX6. The Motion 4's dont extend too deep (which is why ppl tend to think they sound bright, the room plays a big part in this as well)
The tweeter is simply astounding, leaves you wondering how it can sound so damn tight and good. But they definitely need a subwoofer though. I would highly recommend atleast a Polk PSW111 or HSU STF1 or the likes and thats a pretty darn good setup for the money IMO. I am not sure about nearfield listening though if thats what you mean by desktop setup.