Hi, I'm thinking of upgrading my first generation (dualcore 1.83Ghz) macbook to the current macbook or the possibly upcoming new revision. (If this new revision does not have enough advantages over the current revision in my opinion, I might prefer a current macbook for a lowered price after the new revision comes out) Current situation: The fan speed (and temperature as they relate) of my first-generation macbook running tiger is somewhat disturbing me. I use the macbook in clamshell mode (closed and flat on the table) with an external 24" lcd. After some time, the temperature is about 60°C and fans run around 3300 rpm (sometimes lower) under "light use": adium, safari, mail,... When I for example play a movie in vlc (about 40% cpu use), the fan speed goes up to 4000-5000rpm I think. When opened and/or put on a stand to allow airflow beneath it, the macbook does run cooler but not that much. To put this into perspective: I also own a Lenovo Thinkpad R60 with the same cpu. The most noise I get is the harddrive spinning. The fan is just plain off most of the time, even under load! (I do know that it's not completely fair to compare a 13" "thin" notebook with a 15", however this argument alone does not make the macbooks fan noise "acceptable") Question: Do the current macbooks run at a lower fan speed and temperature? Even under load? (I would also appreciate actual numbers including the "conditions" like external monitor, flat on table etc etc..) This is the main question and reason for me to upgrade to a new revision. Other possible reasons to upgrade: - Faster (This isn't that important, though always nice) - Leopard (Also not that important, my current system runs very stable while I have the feeling leopard on my mother's imac runs a little bit less stable. I mainly like the quick preview and time machine, though I really dislike the look of the menu and dock) - Bigger hard drive (Not that important as I have a 120GB 7200rpm hard drive in my current macbook, but I could upgrade the hard drive in my thinkpad which is always nice) - New warranty (I've about half a year left of my 2-year store warranty) These "other reasons" are all nice to have, but not worth that much money for me.