I went from a 5040UB to an RS-520, so a couple generations older than what you're looking at.
The JVC is an upgrade across the board. Colors, motion, HDR, and of course contrast are a noticeable step up. The contrast alone makes it worth it, IMO.
JVC RS-520, Elite Screens 100" AcousticPro UHD electric
Klipsch RP-8000F, RP-450C, 2xRP-240S, 2xRP-402S, 2xSVS PB-1000
Onkyo TX-NR585/HDFury Linker/MiniDSP 2x4 HD
Panasonic UB820/PC/PS3/PS4 Pro/Switch/WiiU/Xbox One X
Logitech Harmony Hub