I like the Kobo options a lot, I have a device from them that was the Kobo Aura HD from Ebay that was $50 dollars in great condition. Kobo has better support for loading whatever you want on it without any annoying issues and it is running linux under the hood and has a lot of expand-ability because of it. These days I use a kindle paperwhite 4 and honestly, it just isn’t as well thought out. It is waterproof & has a higher resolution display but I found the Kobo OS was faster & the device with buttons had a much better design overall. So, I wish I had gone for an up to date Kobo alternative when I upgraded. So, go Kobo, don’t look back, & get second hand if you want to save some $$$.