Currently running chromecast with Google tv 4k, but keep facing performance issues. I think related to the 8gb of space (almost full thanks to Kodi), ddr3 and an older soc? It's connected to 1gbs.

I'm willing to spend the shield tv pro money, but is it the best choice for my use case? I'm not using any Netflix, prime, etc. Just Kodi (inc 4k remux from 1gbps connected Nas), YouTube and F1 app.