I'm in the market for a used a lappletop and my budget is about $550-ish So...for $500 i can go with a 12" aluminum 1.33 PB with max ram 80gb HD or the exact same specs only its an iBook and costs $50 more. I intend to install leopard and want the smoothest performance...especially for the eye candy. I've heard that leopard actually increase some app's loading time over tiger on G4s...BUT I've also heard that coverflkow quicklook and 3d dock can be a bit choppy on the PB's fx 5200. I really want to choose the PB because its slightly smaller and cheaper, but mostly because the iBook looks like the powerbook's poor little cousin with downs syndrome when compared aesthetically. Just my opinion. I know that the iBook's 9550 is supposed to run circles around the fx5200 in benchmarks or something..but can anyone tell me if there is a noticeable real-world difference between the two in rendering leopard effects? Thanks!