I have a question regarding upgrading my Roku 3. My system includes a Marantz SR-6005 AVR, Blu Ray player, Definitive 5.1 speaker system and the recent addition of an LG OLED55B7A TV, which is obviously 4K. All devices are routed through the Marantz with an HDMI to the LG ACR input.
Watching most content, the LG is upscaling much of it so it looks amazing. But since the Marantz doesn't support 4k, I'm wondering if it makes sense to get an Ultra 4660 and if so, what advantages I'd realize. And if I were to get the Ultra do I need to upgrade the HDMI cables even though the Marantz doesn't support the latest format? I know this may seem 'dumb' to ask, but I have an opportunity to get a new 4660 for $40 but if there's no improvement over the Roku 3, its money down the drain. Thanks.
Definitive studio monitors, SW, surrounds
Mill Valley, CA