I have an old PRS-T3 from Sony and would like to upgrade, but don’t know much about the current world of ereaders, maybe someone could help me. (The PRS is working fine for books, so I can wait, but many websites stopped working and I would like to upgrade)

It would have to be robust and have a similar form factor(maybe smaller but not much bigger)[3 inches/7.5 cm] and I would like physical buttons, but they are not required. Since I am using omnivore as a read it later app and read my local newspaper on these devices, google play and a webbrowser would help a lot.

Thanks.

I don’t need an integrated store or drm reader, I add all my books manually.