Just bought a used Early 2008 13 inch Macbook in decent condition. When I bought it the optical drive was making a ratchet at startup, I tested it with a blank CD and then the noise went away, the battery is completely dead at 230 cycles. Other than that it runs on Leopard. It only has 1gb of ram, will that be enough to run SL? I intend to use Aperture 3, which runs on Leopard, but I'm wondering if there are any performance improvements when upgrading to SL. BTW: I got it for a steal of $180.