Roll Your Own
There's still a lot to be said for a dumb TV and an external media centre PC. If you've got something capable of running Linux (Raspberry Pi, perhaps) then it should have quite a long life, and if it runs out of processing grunt, you can keep the TV and upgrade the media centre hardware.
Plus it's not as likely to transmit your viewing habits and conversations to third parties.
Biting the hand that feeds IT
