I would definitely recommend going the PC route. Depending on your computer, the hardware upgrades needed to run the game smoothly could turn out costing around the same as it would for all the PS2 equipment. It's also more reliable, as Yearg said, than hoping your Playstation isn't going to conk out.

There's also USB adapters available that allow you to use your Playstation controller. I bought mine for somewhere around 5-10$ on eBay, and it makes the game so much easier to play. It's cheaper than buying an actual PC game controller, and the official Sony controllers tend to be a bit more sturdy than the PC wannabe's.