Hi Gandalf...
I hope this helps....
the OSD on the 1070 will only pass through its analog video connection and only at 480i or lower ...so a composite or an s-video cable would work fine for the OSD as would a component cable so long as the source is not in progressive mode...
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Outlaw 1070-Mirage M-290(main)+MCC(center)+Omnisat Micro(sides) nanosat(back)+ +PS12-90(sub)-Technics SL-5 turtable+Cambridge Audio 540P-HTPC - SamsungDTB-H260F HDTV tuner - Optoma HD 20 +100' Draper screen -lots of spaghetti and toys