Suggestion

Hi People!

I was searching a ereader to buy with this features:

-Best readability (8 inch display at least, best resolution, and so on)

-Best popup dictionary (I have a kindle touch and I use it a lot, but I don't know if there's something better than the kindle's one. Presently I'm jumping changing from a dictionary to another when I haven't the meaning!!)

I put an eye on the Kobo Aura One, but I don't know nothing about its popup dictionary and someone tells this ereader has several problems (For example the battery life, but on the other hand I don't use either the wifi or LED)

Which one would you suggest me?
(?Should I wait until december to find special offers or new models?)

Thanks a lot