so the 20 series is 12", 30 series is 13", the 50 series is 15.6" all good so far, but the 80 series is 14"?? and the 14" are the only series that have dedicated graphics.... ?? shouldn't it be 40 series is 14", and the 50 series has the dedicated graphics, or 14" and 15"? Why must manufacturer's make it near impossible to keep track of model numbers?