I’ve been a DTV subscriber for nearly 20 years, but I haven’t kept up with the advances of the hardware. I have an ancient HR-24 that I’d like to upgrade - for a better GUI experience if nothing else. I’m a 4K user, but have no interest in DTV’s offerings. All that said, what unit should I politely ask for if I call DTV? Just looking for the latest unit that I can swap right into my system, no installer required. Thanks in advance.