Sean, they work extremely well as primary or background, I have 5 sets, from the MGIII to the small on wall. High frequency is the only limitation. The sound "travels well, and is coherent", ie. down the hall in the bedroom or outside, imho. The MGIII has the ribbon tweeter and is balanced from top to bottom. I also use two DWM bass panels. The worst you can do is send them back for credit on your dime. Combined with a DMW bass panel, you will be able to rock.
Jerry