I want a tablet so that I can read a pdf on the metro on my way to work. Often there are enough seats for everyone in the morning so I suppose a netbook would w

I want a tablet so that I can read a pdf on the metro on my way to work. Often there are enough seats for everyone in the morning so I suppose a netbook would work then but in the evening I'm usually standing so keeping something on my lap wouldn't work. Holding a light tablet and scrolling down by sliding a finger down the screen would be awesome though.