I am planning to get a MacBook Pro 13.3-inch, probably the 2.53 GHz model. I selected the 13.3-inch because when I travel, size and weight are of upmost concern. But when I am not mobile (90% of the time), it will always be plugged into a 24" LED Cinema Display. So my question is, is the integrated NVIDIA GeForce 9400M strong enough to almost always be driving a 24" LED Cinema Display? I'd hate to go up to a 15-inch just to have the option of a dedicated GPU, but if that is recommended for when you always have an external monitor attached, I would consider it... Thoughts?