Find the weak point before spending
Check your current device's app support and update status. Test the connection where the screen actually sits. A new streaming box will not fix an unstable network, and a faster router will not make an unsupported app compatible.
Compare the practical details
Look at Ethernet availability, remote accessibility, storage and the manufacturer's support policy. Confirm the seller's return terms separately. Ask support about the exact model you are considering rather than relying on a general compatibility claim.