I've been listening to music in 2.1 and it's so difficult to tell the M50 apart from the M5. Brass and sax sound more detailed with the M5 but when I listen with the M50, I don't feel I'm missing anything. Soundstage is the same. Pretty amazing engineering actually.

I should point out this observation is in my main room. As I've said before, there's a big difference between the M5 and M50 in my living room which is very bright. I find the M50s much easier to listen to in that space at the expense of loss of detail which I frankly don't mind.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated