I have an ancient (by today's standards)Kindle 4nt
I have a Kobo Aura2 v1
Both have solid hardware. Both have WiFi (only)
I use Calibre to USB side load, so I could care less about the Device Store UI.
I shop from my PC, take care of that pesky DRM, and load on whichever device strikes my fancy (The Kobo stays home always).
I sorta like the latest Kobo firmware book manager, but either gets the job done.
Note: I use my TAB A for PDF or color when needed, so I do not need or want a LCD reader for just my normal reading.