Hi, I'm running Tiger, quite happily, on my '07 2Ghz/ 2GB MacBook (the one with the 667Mhz bus). I avoided Leopard as I'd seen it running on a friend's similar machine, on which it looked and felt slower to use than Tiger. Having read that Snow Leopard is faster than its predecessor, I'm wondering whether it's now time to upgrade? But has anyone here tried SL on a MacBook similar to mine? I don't want to upgrade if it's at the expense of performance - but I'd like the newer version of Mail and a few other things. Any advice/ feedback appreciated.