I've gotta agree: For the past month (exactly) I've been finding fan-made pony songs every night to post on Facebook for family and friends, to give them some idea of what's so great about bronies, but everywhere I look, it's nothing but dubstep and techno.
Have you tried some of Mandopony's stuff? There is Loyalty, Student Of Celestia, I'll be Waiting, A Long Way From Equestria, and so on. Though you are right, there isn't enough non dubtrot/techno brony music.
As for dubtrot.. I'm neutral about it, some dubtrot I like, others I dislike!