I am considering replacing my htpc with an xbox 360 or ps3. Can someone comment on what I would need to set either of these up? My projector is a Zenith Pro 900x. I think that rules out the Moome card.

You'd need an HDFury or a Moome external box.

Actualy for the 360 you would only need the VGA cable and connect directly to the PJ RGBHV input.

HDFury gamers edition will come out which is supposed to be a cheap(er) and easy all-in-one solution. Although the normal version with an added psu will probably get you even better PQ.