Mike O said:

What about DYS?

Where the FOX releases of the other Leone films (FOD, FAFDM, DYS) downmixes too?

They are all downmixes for the mono. And the fault is with MGM, Fox just puts the discs out that MGM makes.

For anyone living in the Washington DC metro area (Northern Virginia/Southern Maryland, USA). The American Film Institute in Silver Spring is going to running a Sergio Leone retrospective:

http://www.afi.com/silver/films/2014/p67/sergioleone.aspx

Fistful, For A Few and Dynamite are all 35mm. Sadly, TGTBATU and OUATITW are DCPs. They have run the extended 35mm print of TGTBATU many times there so I'm curious to see if the DCP is the new 4K. Anyway I'm there for Fistful and For A Few.

Also they are have a Bava retro also:

http://www.afi.com/silver/films/2014/p67/mariobavacentennial.aspx