stay away from sony. their computers blow. trust me. I use a gateway 4520GZ. its designed to be thin and light. it weighs 5.5 pounds and is an inch thin, so I carry it everywhere (every day at school). it also has Centrino, so I can get 5 hours+ out of a battery, depending on settings and use. that also means I have wireless internet, which totally kicks ass. I think it cost about $1300-$1500.