I notice that its $540 to upgrade to a 256GB SSD....this isn't bad!...is it? I know the samsung 256GB's are around 500 dollars flat. Is there a better deal out there for a 256gb? im considering *for the first time ever* upgrading to SSD through apple....am i insane? from what i understand, some SSD's are faster than others, but in normal use most will experience very little difference in speed..