There is a very good Saturn emulator and STV PCB , called Satourne. It is a French emulator , so almost all website are in French but on the download page of the official web site, i saw you can download international versions.
Just search on google with "satourne" , you will have lot links.
This emulator use Open GL for 3d . So if you have a correct 3d graphics card , i think you can play Virtua Fighter very well on your machine.
Another solution could be to use Chankast emulator (dreamcast emulator) and use the Dreamcast version of virtua Fighter. But i think it requires a more powerfull machine.
Another solution would be to put your Saturn or a Dreamcast in your cab! or find an STV board with the game.