[sas]

First, I know nothing about computers so any talk of bus speeds etc.. will go right over my head.

What I need:
-portable (for school)
-battery life
-durability
-MS Office (mostly word, excel and ppt)

I do not care for:
-video/music
-gaming
-appearance

I've narrowed down my choices to the Toshiba n205 and the Asus 1000HE since they have a 6 cell battery but am open to suggestions.

And do these things heat up quickly? How long do they normally last for realistically.