Question about the Blu-ray and the mono.

I've been doing a bit of research about which Leone releases to buy on Blu-ray, and I'm still hazy on some details. What I've basically gleaned is this: for GBU, Fox have finally fixed the foul-up with the mono on the new single release (While it shouldn't have happened in the first place, kudos to them for doing so!), so outside of the controversy about the color, it sounds like a safe bet since apparently no one thinks to ever restore the theatrical cut. Though the omission of the Italian audio is immensely annoying. For FOD, there was a 4K restoration which premiered at Cannes this year for the 50th anniversary, which may find its way to video at some point (It apparently "depressed" Quentin Tarantino since it wasn't 35mm Roll Eyes.) In the interim period, it sounds like the US releases are foul-up downmixes and my best bet is either the German or Italian release (Apparently one has lossless audio, the other doesn't.). For AFDM, it sounds like the German release is the best at present, maybe it'll get a restoration someday. The odd man out is DYS. Is the US release a downmix too? I've heard conflicting things. If it is, what's my best bet? Is the Italian release the proper mono, if it even included the English track? I guess I'm fine with the US release of OUATITW, I understand that actually wasn't messed up. I would like all of the extras too, those Frayling commentaries are gold, but could just get the anthology boxed set for those, probably used, for a pittance. Thanks for any answers.