I would definitely upgrade if i had the money right now. Besides the new obvious features such as a better way to organize (stacks and spaces) and access through iMac and Time Machine, the new OS X definitely has the compatibility with PC's that i was looking for, already coming with boot camp installed. However, you probably have to have the lastest macs out right now to even run lepoard. The system requirements state that you need the recently put in Intel processor 512 RAM (not a problem thankfully unlike vista) and 9gbs of space. but even if i wanted to upgrade, i would rather just buy a whole new mac book pro w/ leopard already installed :D

I would vote against leoptard. It sounds like its more crash prone than Tiger. I dont think I EVER read about Tiger crashing. I think someone even compared to Vista lol.