My computer is a 1.8 Ghz Power PC G5 with 256 MB DDR SDRAM running OS X 10.3.9. Is it worth upgrading to Leopard? I presume I need to upgrade the memory - as I'm in the middle of rural France I'll have to install the memory myself -is this doable? I think I know the memory to buy but any pitfalls I should know about? Maybe I should go with tiger? Any advice? Apologies if I've posted in the wrong place.