Instead of Safari, use Leopard Webkit. Visually identical to Safari; the only differences being the increased performance.
Here's the link to Webkit, as MisterKeeks said, it is a good Safari alternative and based off of Webkit like Safari, but it's faster and still receiving updates while Safari for PPC hasn't been updated since version 5.
http://www.macupdate.com/app/mac/43456/leopard-webkit