Trying to get away from my phone more, and an e reader sounds like a good way to get myself to read more. Kobo is sounding like the most recommended one based on some googling, but I’m also ok with jailbreaking something like an older kindle from eBay. Something that plays nice with Libby would be ideal but not required. 
hmm that XTeink is so tiny and $70 is a good price point
if I ever get to live somewhere with good public transit I would definitely get one of these
Yep! I would’ve bought one if I didn’t already have a perfectly servicible Kobo.