I've just bought a shiny new 160gb TV from an Apple store today and I noticed that it is the old version. I've read a few threads on here all highlighting issues since upgrading such as sluggish response or no longer easy to browse your own media (in other words more geared towards buying/renting from iTunes). As I'm in the UK, the ability to easily browse and watch my own ripped shows, movies, etc is more important to me than buying the limited content on the UK iTunes store. Should I upgrade? Is there any real reason not to?