MacBook Air. It now comes in 13.3" and 11.6" screen sizes. The battery life for both has been improved. 11.6" has a 5hr battery and the 13.3" has a 7hr battery. Full keyboard, trackpad, etc... No optical drive but you can use the drive from another computer with included software or you can buy a USB drive from Apple. It can also run Windows via Bootcamp(Bootcamp ships on every Mac). I recommend it.