Chome book for university?

So I am running off of a 2013 macbook air, but i'm thinking of selling it and getting a chrome book and a PC(or iMac) as my main computer with a chrome book to use as my note taker and daily computer

  • All I use on my mac is chrome (docs, slides, rdio, and web browsing)
  • but I do have an old laptop that I use for torrents and as my back up because the airs small storage.
My other option is keep the Air and still buy a PC or iMac but get a nexus 7 and use that
Any opinions?