The Revostock suggestion was based on sales. I only have around 30 songs on the site but every now and then I get a sale. Someone with a bigger collection may do better. It’s easy to upload and fill out information, and they seem to actively advertise their music with tweets to customers and promotion on the site.
I’ve got two favorites. I like these because they were on shows that my kids and I just watch because we enjoy them. Brain Games and The Voice. It was pretty cool because the kids have heard me work on the cues and they recognized them as mine immediately.