Well most people are downsizing to a tablet rather than a mini laptop. However, if you like the style of having a keyboard and screen then you will need to search for 'netbooks'. They are not as fast as laptops but are significantly lighter and easier to carry around. Popular brands include ASUS and dell but there are many on the market.
maybe try a net book or a sleek book would be good for you it's much slimmer and lighter. asus and hp is one good brand if you want a more affordable one try acer
