EDM as in Armin van Buuren, Dash Berlin, Above and Beyond, Markus Schultz, etc or some old school chill out music? It's a big difference.
One thing that often overlook is mid-bass. Modern edm require very good mid-bass reproduction more than the deep bass (unless you're into dub-step). My recommendation is, especially with your room, getting a floorstander that can produce big scale music. Only adding subs if you think you need deep bass. For 2-ch music, many would recommend you dailing in subs as your extension to the mains, not overlapping (regardless of floorstander or standmount) which I think is the correct way.
Also if you can audition, try Be tweeter with trance music. It's as if it's made for trance.
One thing that often overlook is mid-bass. Modern edm require very good mid-bass reproduction more than the deep bass (unless you're into dub-step). My recommendation is, especially with your room, getting a floorstander that can produce big scale music. Only adding subs if you think you need deep bass. For 2-ch music, many would recommend you dailing in subs as your extension to the mains, not overlapping (regardless of floorstander or standmount) which I think is the correct way.
Also if you can audition, try Be tweeter with trance music. It's as if it's made for trance.