I will suggest you Macbook pro 13-inch model. It’s the lone laptop to benefit from a Retina screen and the latest Broadwell processors. As for the Air, its stamina is still unbeatable.
Yes, You can buy the MacBook Air. It is the light weighted laptop with enough performance for a large number of users to serve on the road and on the office desk. It provides you with smooth performance as well good features, that you expect in an Apple's laptop.