In my opinion, Firstcom and Killer Tracks are the best options for quality production music. They are also extremely expensive.
But when I look for alternatives, the gap between them and the others is SO vast, in terms of quality. It makes me wonder are there any great low-cost music service options out there that I just don't know about. Any ideas?
It's hard to know how wide YOU think that gap is. Having listened to many KillerTracks and drooled, I eventually voted for SmartSound with my pocket book and never looked back. The Richard Band series in particular is incredibly rich and is every bit as good or better than some fare from KillerTracks.
What are you using the music for?
For use under Opening Titles, I've used a lot of the material that is regulary GIVEN AWAY by "footage firm." Their music comes in a large variety of genres.
I do event-videography, so I don't need/use music as background ambience for scenes, etc., just for opening titles and for occasional "scene connectors."
I find the Footage Firm stuff to be most satisfactory for those uses.
Music is such a subjective thing, isn't it?
It's often the most difficult element to agree on with clients.
Especially female clients, and I don't mean that in a sexist way.
Some women don't like anything that's too "rocky" or that has an edge.
Mostly use sound dogs for BG and emotive tunes.
When I want music, I create a MIDI file (*.QSD in my sofware) then use my custom sound fonts and play it myself instead of paying someone else to do it. Makes it real easy to customize the music to my needs!