trust me on this a 4Kg ( 4.5Kg in my case) laptop is not something that you want to be lugging around much and finding a bag for it that lasts more than 6-8 weeks is hard i would go with what slenderman379 said buy a dell ultrabook and whilst personally id go with other makes ultrabooks there out of your $1100 max i think ( having no clue what the us price for it is )