I have a 3-yr old iMac. Safari freezes often and is driving me crazy. My 10.5.8. is up to date. I wanted to try Google Chrome, but my OS is not supported. Just in general is there a reason for me to upgrade to a 10.6 + OS? I am not very computer saavy. I do play some online games, but mostly this is a work computer (work from home) Will higher versions enhance my iMac?