... or the expensive option: to trade up to one of the Darbee-enabled Lumagens
You won't regret the more expensive option. I bought myself a 2021 for Christmas - a move from an early XD. I haven't managed to calibrate the 3D LUT yet, but Gordon has assured me that it will make a huge improvement to linearity even to the 37" Viera PX80B in my bedroom which is connected to output 2. Farewell to solarisation (I hope).
I don't know whether it is a case of emperor's new clothes but I saw an improvement after transferring the settings from my XD - yes the HDMI inputs transfer directly.
I don't know why there's so much hostility towards DVP on AVForums but I mentioned it in passing and was immediately pounced upon by several purists. Perhaps it is envy - not many people on there can afford Meridian, Lumagen calibration software &c.
I see it as analogous to Pro-Logic II extracting ambient information from phase in the recording. The engineer didn't put it in there deliberately, but there appears to be information in there that DVP uses to make the picture something you can step into - almost like increased depth of field. I actually studied the maths used at University, but couldn't get my head round it then.
All I can say is that probably due to Jim & Pat's policy of continuous improvement the 20XX range trumps the Previous generation even before you turn on DVP and 729 point 3DLUT calibration. When you do turn on Darbee (30-40, in HD mode) the improvement is obvious. If you want to future proof you can always pay extra and add the 4K output.
As my 25 year old nephew keeps reminding me YOLO!
Tim