BurnOutPC.com has posted their review on the Evercool WC202 Watercooler that fits in your 5 1/4 bay.

Im happy, it performs a lot better than I expected from a water-cooling kit that fits in one 5 1/4 bay, and im really impressed by the easiness of getting this kit running and how silent it was. Installation was easy, the waterblocks look really nice and aside from the somewhat higher temperatures than with a normal water-cooling kit, I would still recommend this product since it's so cheap, it's almost a steal.

Evercool WC202 Watercooler reviewed