Getting a 500gb harddrive and 4gb of ram is probably worth the $100 alone. Let alone weighing one pound less, having an extra USB port, dual-core processor, non-integrated video card, and built-in card reader.
Keep searching!
Not to mention that one has an actual name-brand graphics card with the potential to play actual games (if one so chooses to do with a laptop) rather than the generic Intel card that'll probably only handle WoW and other low-resource games