Don't go for Sony Vaio....not built according to India, you have to take special care, bad customer service....
Toshiba, again same problem, you won't find great combination at good price,
HP ...well two of my friends bought that touch screen version and regret it till now.
Lenovo is so so but as Skull & Bones said, Dell is the best choice. Customize according to your need and as far as service is concerned, when i was studying, my university was 25 kms away from the dell service center but still the guy came the same day.....Look for Dell's extra slim notebook..its great...
BTW do tell what's you budget...