If portability is your primary concern go with - Macbook Air 13" or any Asus ultrabook's with i5 3rd generation and 13" screen size, considering you are fixed w

If portability is your primary concern go with - Macbook Air 13" or any Asus ultrabook's with i5 3rd generation and 13" screen size, considering you are fixed with Debian. Your feature checklist should have 8Gigs or more expandable RAM + Excellent display resolution + Battery backup + at least minimum 128GB SSD. A checkpoint - Most ultrabooks have many many driver issues, esp graphics, so do a research. Best safe bet is to go with Mac Air 13", they run perfect! Worth mentioning the huge community of users.