The latest laptops that are rated among the best are apple's MacBook pro and MacBook Air. The two laptops have slight difference in design, features and weight.
MacBook Air which is slim and light with impressive ultraviolet profile lack ethernet port and optical drive. This means that one must search for a WIFI even if there is a more stable wired network available for connection.
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To overcome this limitation, apart from the USB ethernet adapter and the thunderbolt ethernet adapter provided by apple which costs around $ 30, pick the cheap method. It's cheaper to buy the plenty available USB to ethernet device and save more than $20.
According to the Cnet's reviews, take a look at the latest version of MacBook Air 2012.
http://www.youtube.com/v/5_w9XllkixQ
Source: cnet