[medwatt]

Hello fellow eReader owners,
I've been on a hunt for an eink reader for about a week now. I am basically interested in reading technical/scientific books that are usually in PDF and DJVU formats. I am ready to pay as much as $200 or something close to the vicinity of that amount. I think 6'' eReaders are definitely not going to be enough for my purposes. Also 9.7'' eReaders and above usually exceed my budget. So, I've narrowed down the options to three:

1. Kobo Aura H2O - Its 6.8'' and so offers a slightly larger screen estate compared to 6'' devices. The base price is £139 ($213). It definitely has the latest technology of all the eReaders. This was released at the end of 2014.

2. Onyx i86 ML Plus - This has an 8'' screen which I think will be ideal for my needs. It costs €226 ($226). So, I get much more screen space for just an extra $13, which is exactly why I'm considering this eReader. This was released in the middle of 2015, but it is definitely using older technology.

3. Pocketbook 840 - Also has an 8'' screen. Its slightly cheaper than the Onyx, but it is difficult to buy and is based on an even older technology than the Onyx.

To say the truth, in the beginning, I was leaning heavily on the Aura H2O before I came across the Onyx. The Onyx seems to be ideal for my needs really but according to some, the software is unpolished, the frontlight is splotchy, scrolling seems terrible, and so I'm wary whether to invest that kind of money on something that might give me headaches in the future and so I might regret buying it.
Also, according to Michael on GoodEreader, there's some optimism on the horizon with regards to large e-readers in the sense that most e-readers will dedicate all screen issues to hardware. So, I'm really in a deeper dilemma on whether to commit and buy the Onyx or wait, God knows how long, until there's something that is worth the money.

Please provide your opinions.