If you couldn't tell from the tracklist, apparently "The Best" thing that Spectral Force offers musically is from the "Spectral Force Chronicle" title, which I believe is a remake for PS2. Let's work backwards to get the less appealing stuff out of the way, then hit the main course: shall we? Let us anon.
The very first Spectral Force never had a soundtrack released for it. Apparently, the music wasn't held in high esteem even by its own company, because the "best" music they could find were the opening vocal and an arranged version of a main map theme. Yikes.