Hey look what's here!
Just back from meeting Bob from Apple at the nearby Apple Store (thanks again, Bob!). And standing in the store, there was just no question of which model was calling out to me...er, my daughter. 20 inches it is.
First surprise -- there's a real power button. I remember for years how Macs had some goofy keyboard sequence to turn them on. How much more sensible it is now.
More later. :)