Dont go for mac! Would recommend doing research on HP laptops
Don't go for iOS, rather go for any windows with i7 processor and 2gigs or more of graphics card.
I will suggest not to buy mac for such heavy software, they will be fine in starting but then they will not be effective much. Go for Windows any dell inspiron will work.
If there is no need for heavy after effects work, then sure go for MacBook Air.Else go for pro models.
Plus if you can get the latest model of MacBook Air as it has updated processor and integrated graphics for faster rendering.
There's no Point of buying a MacBook Air now. If you have the budget, go for MacBook Pro. If not, go for windows!