Hey All, Long time lurker here. I have a Macbook from 2007, the model # is 2.1 and it has a 2.0Ghz Core2Duo processor with 2 gigs of RAM. For being almost 5 years old it works perfectly. The battery even has 95% of it's original capacity which just amazes me and speaks to how well Apple builds these things. My main issue with the computer as it sits is everytime I try to watch an HD video it gets very choppy and I'm guessing that's just due to the internal graphics card and nothing can be done about it. My other gripe is starting up and waking the computer from sleep it's a little sluggish. It's really only used for web surfing, occasionally photoshop and Office. I'm currently running Leopard for what it's worth Would upgrading the RAM to 4GB and changing the hard drive to an SSD make a meaningful impact or am I better off retiring it and buying a new Macbook Air?