I have recently bought Epson 5050 (called 9400 here) and it's my first projector too.
I watch on 133" screen from 10' and wouldn't be much concerned with 4K vs e-shift. Resolution seems fine to me.
The major problem for me is motion, it's pretty bad on Epson. After connecting the projector, I fired DTS Demo disc with the "Snow White and the Huntsman" clip, and instantly noticed the motion was juddery. Or maybe "stutter" is the correct word. Anyway, lots of action was followed by some kind of judder, especially on contrast scenes with white background (to be fair, not ALL action was followed by judder). I couldn't believe the motion can be this bad. I watched "Avengers: Infinity war", "Aquaman" UHDs and could see lots of judder (again, not in every scene). It's not just me, other users from the French forum reported the same
, even put the video on youtube. Not sure why no one mentions it in the Epson 5050/6050 thread. The only way I can use it is with FI (Frame Interpolation) to Normal, but then it's soap opera all the way. Other than terrible soap opera, motion on FI:Normal is fine with rare artifacts and no judder at all.
I have owned it for a week but is currently looking to sell it and buy (probably) Sony 285/295 instead for the motion processing everyone praises (although it's twice as expensive) or to Sony HW65 (as it costs roughly the same). To note, I'm very sensitive to motion. It's a pity because Epson 5050/6050/9400 is an excellent machine otherwise!
So, if you have the opportunity, go compare yourself. Lot's of people say you can't go wrong with this Epson model, but my experience proves otherwise.
P.S. I was playing UHD/BD on OPPO 205 connected directly to Epson, with auto frame rate or forced 24Hz on OPPO (also checked Epson "info" - reported frame rate was always matching video, i.e. 23.976 fps), with UHD downscaled to 1080p with OPPO and 4K enhancement enabled on Epson (so that I can enable FI on UHD content). Tried other modes on Epson, with the same results regarding motion.