http://www.powerlogix.com/products2/iforcesl/index.html They're available at 900MHz using the 750FX. I currently own a 400MHz iMac DV and am considering this upgrade. What do you guys think of it? I'm buying a new iMac or PowerMac at the end of May or start of June (probably iMac seeing as the PowerMacs will likely see an update at WWDC or MacWorld Creative Pro), so I'm questioning if it's worth it to buy just the upgrade, just the new computer, or both. I'll have roughly a $2200 computer budget then, so which route should I take?