I recently bought the i5 one - absolutely love it. Use a MacBook Pro for most things but this is just fantastic.
You'll need to wait for the next 15 or 20% off offer from eBay. Most sell refurbished for around 450 but with the code brings it down to under £400
I am tempted to get one. Would you be able to share the links. Sub £400 sounds really interesting (cheeky)
Loved my one while I had it but the screen bruised really easily while in my peak design backpack. (fierce)