this was discussed a bit on page 1 (
see here) but no conclusion came of it afaik....
the 850 has DCC (120% rec 709 color) and "may" have no THX and supposedly a diff glass, how much all this affects the PQ is what i'm curious to find out. if it's significantly diff then it would warrant it's own thread.
it's also possible that it may have exactly the same "THX(Cinema)" mode as the 800u but since (let's assume) the set is not THX cert they may just call it "cinema" mode, so a diff name but same thing in reality so then that would be one less diff between the two....
I'd say best to wait to find those things before including it here. also since they are not releasing for a while anyway there is no rush i guess....