Which one? The projector will be mounted almost 50cm from the ceiling. I will be able to keep the room quite dark (blackout curtains) It will be projected on a screen 3 meters away so a good quality image at full (or almost full) zoom is required. It will be used for DVDs, X-box and watching some documentaries and movies on TV. Where I live (not UK) the HS50 is hard to find and more expensive and the Sony service less flexible than the Panasonic one.