VGS is better than EPSXE only if you have a VERY sucky computer (something like a Peitium 3 550 with 64 MB ram, and a onboard video card!!). VGS was easier to use, but EPSXE's compatibility is higher now! And the sound in VGS is not great, specially in Final fantasy games (FF7 works without some sounds, like the sword slashing).
So, I don't recomend VGS anymore. IMO vgs could be a great emu nowdays, if it wasn't discontinued
And, like the others said, its ilegal to obtain VGS on the net. If you find an ond copy on some store, don't buy it. Its not worth anymore!
edit: Yeah, VGS don't need the bios to work, but nowdays its easier to find a bios somewhere than a copy of VGS!!