Sorry if this has been discussed before, but the search function has been disaled, and I'm still a little confused on short throw vs. long throw lenses. I plan on getting either the Sanyo Z1 or Sony HS-10 and know that the Z1 is short throw and the HS-10 uses a long throw lens. I plan on mounting the projector 13ft away from the screen and plan on sitting 10ft from the screen. What can I expect with the different lenses? Which is better for my room size?