Kobo or Nook

Hi,

I'm looking for some advice on what to buy for my next e-reader.

I have a Kindle, but I am looking to buy a Kobo or Nook to read library books on (I'm in the UK). I am considering buying second hand, but I would like one with a light, so I'm considering the Kobo Aura, Kobo glo or Nook Glowlight. Am I right in thinking all three would do the job?

Apparently Nook accounts are no longer available in the UK - is this a problem with using it to borrow library books?

The Nook would be cheaper second hand I think - is this due to the fact you can't get an account?

Anything else I should bear in mind?

Thanks for reading.