PSone had some of the best Games ever been released. And there are many people who are looking to play them on their PC. The solution is simple.
All you need is this file. It contains everything you need, the emulator, bios etc.
Alternative, download the "ePSXe Ultimate Pack".
Now you only need to search for games, which should be in .bin format. The speed is good, and the sound too, while it supports control, saves etc.
Some games to try: Castlevania - Symphony of the Night,Final Fantasy VII, Metal Gear Solid, Resident Evil 1 + 2,Gran Turismo 2, Tomb Raider, Abe's Odyssey, Tombi 2, Legend of Dragoon, heart of darkness, dino crisis, nightmare creatures.