I've had my Chromebook since Sunday and absolutely love it.
Great value for money, amazing screen, amazing battery life, light as anything and great speakers too.
Couldn't recommend it enough.
Depends what you'll be using it for.
I just bought a Toshiba Chromebook for £220.00 from John Lewis.
4GB Ram - Full HD Screen - 16GB SSD Hard Drive - Long Battery Life
All I need it for is basic word processing, emails and the internet.
It'll probably last me 3-4 years without slowing down...