I have a special place in my heart for you mate
After all I did get that H57 because of you!
Sucks about the H78, but you got it from Moscow so you should be covered.
If you have the $$$, go with RS1, I will when I do. The idea of spending that kind of $$$ though is scary at this time.
Now for the HD7100. There are no rainbows with this sucker. Running it at 48Hz at 6x speed color wheel. The picture is sharper than H78 by a good margin to me. Blacks are solid and I love the color pop in dark scenes.
I think for the money this thing is hard to beat: 48Hz, no rainbows, sharp as a tack optics, and over 650 ansi contrast (better than RS1)
Now people seem to have problems with these, so that is s/th you got to figure out if it's worth it for you. I got 750 hrs+, starting to get occasional start up misfire, but I just wait and all is good.
Let me know what you decide!