I wish I could tell you, I haven't done much research into laptops for a long time. When I did it was all about the 7900go series... so I doubt I can help much. I doubt that the 8700GT is that good that it is better than 2 8600 GTs though.
My friend who likes to hack and mod stuff, was looking at my Laptop today, and said that my Graphic Cards looks changeable, like to upgrade to a Single GTX or something in the future.
What do you think?
BTW, the Speakers/Sub built into this Laptop, are amazing, Harmon/Kardon.