Mostly using the Kobo Aura currently. E-ink still gives me the best reading experience, and the Aura is well designed and meets all my needs (I particularly like how low the frontlight can be set, compared to my other readers).
I read on the Nexus 7 (2013) for some time, trying to see if I could manage with a device less. While it's do-able and works better than any other LCD screen, it's nowhere near as comfortable as e-ink. So Nexus 7 works, but the Aura is a better choice for me.