Kobo Aura One is one of the largest eBook readers on the market and the screen measures 7.8-inch. Kobo has managed to preserve a pixel density of 300 dpi even though the size has increased. Hence, it's suitable e-reader if you need a large screen that displays text in a crisp manner.
This device is waterproof like the Aura H2O model and capable of storing 8 GB of content. It's also speedy by employing a 1 GHz processor and 512 MB internal memory.