Hello everyone! I am looking to purchase my first Macbook Pro. I am having a difficult time deciding between a $1749 17" from Amazon that is the older 2.8Ghz Core 2 Duo and the $2298 17" (w/ student discount and tax... have to include tax) from Apple that is the newest model. The price difference is $549. Some things I'm curious about: 1. Intel HD card? Does it really cause that much lag? How is it compared to the nVidia 9400m? I don't mean benchmarks, I mean real life performance. 2. Battery life? Is the battery life in the newest model much better than previous gen? 3. Heat? Is there a difference in heat production between them? I don't care about gaming, so the 512 300m vs. 512 9600m is no concern. Does the newest 17" justify the $549 price difference? Are there any other things that I should know between the two?