My finger has been hovering over the 'order' button for a new 17" MacBook Pro all day, but something is holding me back. I have a trusty 17" Powerbook (1.33GHz) which I've owned for the past couple of years, and was going to wait until the 'rev b' MacBook Pro's (I'd not wanted to be a 'tester' for Intel/Apple), but the pure sexiness of the new 17" has got me Those of you who have, or have owned, both - how're you finding the newer model? Does it run much hotter? How much faster is it with real world app's? And how do the screens compare?