Start with Record Labels that put out an artist that I am familiar with or a genre that I am interested in.Get a list going of potential gems.Preview music online (itunes, amazon, pandora, last, whatever suits you). Buy records that make the cut.
I get your point.  "Ask your friends what hot."  that's why I said, that I am not hating.  I think there is a big difference between asking for sick tunes to ride to or bump in your ride on the way to the hill and songs for edits.
To echo what I posted; I think the music in your edit is a great opportunity to express yourself beyond the visual.  I don't think I was being super negative.  if you want albums or artists that I think are sick, I will hook you up, but a song for your edit... its your edit, not mine.  Ya know?