Seeing you like 5110b, have you considered the GPD-g58? I say it because g58 is very similar to 5110b but q88S is a 7 inch device, much bigger and not as confortable as a 5 inch device (for me at least)
You raised a good question.
The fact that a 7 inch device can't be confortable as a 5 inch one.
I love the grip of the 5110b, and it weight.
I don't know how a 7 inch device will apply in this case.
My main objective in changing the device was to solve some minor annoyances of the 5110b, like the wake up bug and the lack of home and back physical buttons, but thos problems I'm quite aqquainted to it, so maybe it's not the time to change devices att all. My 5110b is working perfectly today, plus, in the past I've changed his battery.
Other objective was to get a bigger screen, but for someone who mainly plays with it on the crowded subways of Rio, a 7 inch can be a pain to play with narrow space.
I will take a look on the 5800.
Thanks again Skelton!