

I have a living room HTPC connected to my tv and have Jellyfin Media Player on that, and it works well. Obviously thats more of an investment than a firestick. Mine was £290 when I got it, I installed linux and I use it for gaming (including locally and streaming more graphically intense games from my PC), watching some streaming services and browsing the internet on my TV.
I do also have a Chromecast with Google TV stick in another tv. I use that purely for streaming and it also has the Jellyfin App installed.
I find both my HTPC and Chromecast are good with Jellyfin. No issues at all, good consistent streaming. But note HDR in linux can be finicky if thats important to you. Of course most come with Win 11 so you have that choice too (I wiped windows off mine)
I do have kodi on my HTPC, works fine with Jellyfin/jellycon but I prefer desktop mode and the jellyfin media player myself. I tend to use the pc with a Bluetooth mouse and keyboard, so dont really use Kodi.
My PC was £290 but I got one that could do a bit more gaming. You can get them for £100-£160 and they’d likely be more than capable of streaming 4k content. Better than a Pi 4 and more versatile than a £60 4k fire stick (even if more expensive - might be justified if itnopens up new uses for your tv)
Other option of course is a Raspberry pi 5 - more powerful than the 4. Ive not tested my pi5 with Jellyfin much so cant comment on how it suites the task.
I use a Boox Note, and I like it a lot. Its an android based eBook reader so you have full access to android apps including side loading apps from other stores.
By default it does not have Google services set up but you can use the Play store should you want. But its not integrated to googles services. Obviously there is some integration to Onyx Boox services which is based in China. However infindnit is unobstrusive and you dont have to use their store or any of their tools.
Personally I use Calibre on my Linux PC to manage my books on the device, and I use fbreader as a reader (closed source) but you can install open source software if thats your preference. KOReader certainly works but I’m not a big fan of the interface personally.
I use ebooks.com to buy books (and calibre to remove DRM so I can use my preferred software), and you can install the Kindle app to access a kindle library if you haven’t liberated your books yet. Ebooks reader works on the device too. Obviously DRM free books from any source and format can also be used.
My device - the note - has an nice crisp screen, is well made with a nice aluminium chassie and is comfortable to hold. I read books in portrait mode so you have 2 pages visible at a time. Its also good for a4 size documents. They do also have smaller sizes that match a kindle paper white.