I am looking for a projector to replace my Sanyo PLV-30. I am quite restricted by throw distance, because I want to place the new projector in the same place as the old one, a little over 4m from the screen. I plan on getting a new screen (16:9 instead of 4:3) but because of room size I don't really want to go much bigger than 100" diagonal. While having a look at throw distances on ProjecterCentral.com I noticed how the Hitachi PJ-TX10 is much more flexible than the Sanyo PLV-Z2. To produce a 100" diagonal the Hitachi can be placed from 2.54m to 5.27m away from the screen. In contrast, the Sanyo only allows distances of 2.99m to 3.88m. Considering the two projectors are basically the same technology (LCD, 16:9) how come the throw distances are so different? I know the lens makes a difference, but if Hitachi can be so flexible why can't the Sanyo? Am I missing something obvious here? I would be grateful if someone could fill me in, or alternatively just let me know that it is just one of those things.