Google for survival kits and CEM/Curtis chips. If you just wish to get the sounds characteristics of some vintage synth and you should be willing to use Apple or Microsoft, than you'll find some proprietary soft synth there. I dunno if they will do something similar to the sound you need from the JX-8P. If you need the full CEM sound quality, than you definitively get stuck. For FM synth, Linux provides Hexter, the characteristics are close to a DX7, but far away to it's sound quality. I don't know any Linux synth emulator that has anything to do with an old analog synth. They are nice synth, but without the intensity of vintage analog synth. For Apple and Microsoft you'll find some analog synth emulations that are comparable to the difference between Hexter and a DX7. You won't get closer to vintage synth than that. Better? If you expect something completely new, than yes, you might find something better, but if you expect something that sounds like vintage synth, than all soft synth are less good, far away from the originals. There isn't a voodoo soft synth, they all sound similar to the soft synth you already tested. Regards, Ralf