hmmm one of the things i like to do when trying to find a new unique edit song is simply use the music i listen to the most....now you should know ur own taste in music, but when i look to edit i usually choose something along the lines of pretty lights, gramatik, or big gigantic...they are 3 producers that always get me pumped to ski, id also suggest going with some jams although its harder, nothing beats a quality edit with a song thats either jammin or has some form of great instrumentation....like i said this is what i look to do when editing because its simply what i like...if i were you, id always keep an open mind and look for new music on a handful of blogs consisting of different genres of music (not just a rap/edm/classic rock) blog...hope that helps and some of the suggestions lead you in the right direction!
I know this might sound cheesy, but it really depends on what mood you're trying to create, and also what style you have. I haven't seen your edit so i can't really recommend anything off the bat. But if you're going for a chill mood maybe look at some pink floyd? Or if you just wanna go hoodrat then yea busta rhymes haha.