Fire TV or….. ?

Hello. While I am not a cable cutter at this time, I have been using Kodi primary for my kids movies. They have a ton of DVDs and to keep discs from always laying around the house, I put them all on a network drive. I have been using a Fire Stick (not the newest one) and I love the layout of Kodi but the stick lags. The menus are slow and it just seems slow. I read the sticky but am still confused. I think something like the NVIDIA Shield is an overkill for what I am going to use it for and don’t want to spend a lot. Would upgrading to the regular Fire TV box make a big difference? Or anything else around that $100 price range any better than the Fire TV? Maybe I will check out the live TV features eventually but for now it is just the movies. I also want a wired ethernet port. Thank you.