I am thinking about upgrading my 350MHz B&W G3. I was looking at the Sonnet Encore G4 500 $299, Encore G3 500 $169, and the PowerLogix PowerForce G3 ZIF 800MHz $299. I was wondering if anyone has any experience with either of these companies or these upgrade cards specifically. I was kind of between the two G3 cards because I don't run any Altivec enhanced software. Your comments are greatly appreciated.