If you have the SFQ level I course that is sufficient.
If you want better, then I recommend learning the meditation by heart and doing them in silence.
If you like, or wish to use meditation music to wash away background distractions I'd recommend one of the generic meditation CDs. You can use these with any meditation.
I have all the material for level I, II, and III. However, I do almost all of my meditations in silence.
I have converted all of it to mp3 and even spliced several meditations together but I only do these when I need help doing longer 1.5 or 2 hour meditations. I find it useful for doing a small universe then a moon meditation, since I've removed the closing of one and the opening of the other for a smooth transition. However, as I said, most of my meditations are just in silence. I like this because it allows the meditation to flow as it will, without any distractions.
You are perfection.