The Air upgrades, as I recall, were dual core i3 to quad core i5 to quad core i7. The quad core i5 is obviously the best one for the price. Though the i7 is onl

The Air upgrades, as I recall, were dual core i3 to quad core i5 to quad core i7. The quad core i5 is obviously the best one for the price. Though the i7 is only $150 over that, which was only worth it to me for the quicker shipping.