Successfully received and installed my RS420!
First impression...man, there are many more knobs to turn in the menu than on my BenQ W1070.
Second impression...damn, this picture quality is stunning right out of the box!
Actually, the second impression didn't come until after I replaced my HDMI capable so that 4K HDR signals could be transferred. For anyone finding themselves concerned over HDMI choices and compatibility (like I was)...for my 30ft run, my existing 4yr old HDMI capable couldn't transfer 4K HDR (no surprise), nor could the Monoprice Luxe series CL3 cable that I ordered. Both failed the compatibility check on the XB1X and PS4 Pro. Fortunately, I had also ordered an RUIPRO Fiber cable just in case and it worked like a champ.
So far we've successfully played 4K HDR content on the PS4 Pro (Horizon Zero Dawn), XB1X (Forza 7), Netflix (Black Mirror via XB1X app), and UHD disc (Planet Earth 2 on XB1X). All of these sources provide an amazing image on the RS420 that even the wife noticed. That latter aspect is the best praise the RS420 could possibly receive. Also notable, we haven't encountered any compatibility issues (odd colors in HDR mode, etc. like a few others have noted in this thread). FWIW...I'm running the source signals through an Onkyo TX-NR777 receiver and then to the RS420 with the RUIPRO cable.
I've also confirmed that the ghosting issues that were previously present in low latency mode following the 'CMD fix' have been successfully remedied in the stock sold by
arret and crew from AVS. This was a huge factor in my purchasing choice, along with reading so much praise about their customer service, which I can confirm is top-notch.
If you've this far...thanks!...and I have a question for existing owners. We watch a handful of 3D movies every year, so it would be nice to have this capability, but I can't justify it based on the prices of JVC glasses. I've seen on this thread that "Xpander" products are compatible, but I haven't been able to find the specific model number for the RF Emitter and the RF Glasses. Can someone confirm that they do work as well as the OEM JVC products, and if so, provide specific model numbers that you've used successfully? The Xpander website compatabiity doesn't appear to list JVC. Any other options besides Xpander?
This a long-winded post, but hopefully it helps others that are considering the RS420 and are struggling with questions about picture quality, handshaking issues, ghosting, etc. So far, I couldn't provide a higher recommendation for this projector.