I have both the Aura and Aura HD. Honestly I had to return the Aura 5 times to get one without pixel issues and the clarity is not what my HD is. I am picky for my eyes (I can see acceptable variances in prescriptions) - I am a major book worm. As a result it My HD is my primary device with my Aura as my backup. I will have to see how things go with H2O it may be my tax refund treat this spring. I am concerned about the battery. I have a nifty case off amazon that has a built in stand and sleep mode so I can crochet and read - Yes I multi task. If you are a book worm go with the H2O. If you don't mind minutely fuzzy go with Aura.
My warning to you is Kobo support is some of the worst I have seen in 15 years as an IT geek. If I did not love my Aura HD I would never deal with them again. I did purchase my Aura when it first came out through the web site. If I get the H2O I may find a local retailer. Good luck. My Aura HD is my 3rd ereader - I made the jump from my cybook devices because I wanted something reliable.
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