I'm sufficiently new to the Mac world that I only have one Mac and have only ever had one Mac - a 667 Mhz G4 Powerbook. I run OS X v10.4 and find it to be fast enough for my uses, which tend to be just Office, the internet and messing about with Cocoa or low end OpenGL work with XCode. I am trying to help a friend who wants a cheap low end Mac. The machine will probably only be used for the web, email and Microsoft Office tasks. Because web standards have moved forwards since 2001, I do not imagine that the Classic OS is something I should recommend. I am therefore thinking of at least an OS X machine. With that in mind, what sort of minimum spec sounds reasonable? My guess from research is that once the G4 threshold is crossed, RAM and graphics card matter more than the difference between a 350Mhz G4 and a 450 Mhz. I guess what I'm asking is what spec of machine is required before the various costs of running the OS become less significant than the cost of the apps that are wanted. My friend is not a real task juggler and the machine is only for home use so the runtime setup will almost always be the web browser + the email client running or Office. Windows will probably rarely be moved, let alone resized. So, comments, suggestions? I guess even with a 350Mhz G4 I can swap in a decent graphics card now that PCI for Quartz Compositor Extreme is reenabled?