I need some help understanding the new Broadwell CPUs in the refreshed MacBook Airs. Since these updates were announced I have read some conflicting info. Based on benchmark testing some suggest upgrading to the high end i7 2.2 GHz processor is a no-brainer and will give a really big improvement for not much money. While others have suggested that you won't see much difference in real world uses. Can someone who understands processor technology give some feedback on this? I would expect these two to be fairly similar, so are there things the 2.2 will be able to do that the 1.6 cannot or will greatly struggle with in comparison? What do I need to know in order to decide which is best to purchase?