It has both VGA and component inputs accepting progressive scan, so just about any box should work. Only thing you want to stay away from is DVI HDCP compliant ports, since it neither has DVI nor is HDCP compatible.
VGA tends to pass better over long distances and also usually looks nicer on this specific projector and some others as well.
Check out the HDTV Hardware forum here, they have a nice roundup of all the current boxes.
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