If your not to concerned about HD, then the Z1 is a great projector for the price, not to say the Z1 doesn't do a good job with HD material. It was one of the first projectors that came out with what is called 1/4 HD resolution.
Qoute from below review "The 960x540 resolution format has been designated "1/4 HD" both in other industry literature and on our site. This is truly unfortunate because though it is technically accurate it is highly misleading. The "1/4 HD" format was created because a native 1080i HDTV signal which is 1920x1080 can be scaled quite efficiently into a matrix that requires a compression of precisely 50% in both the horizontal and vertical dimensions. Notice that 960 is one-half of 1920, and 540 is one-half of 1080."
When you say 106" I assume your talking screen width, for projector's most people talk in terms of screen width. So, for a 106" wide 16:9 screen you would have 60" x 106" or a diagonal of 122". You could achieve this size with a throw distance (projector to screen) of between 12-14ft depending on how you have the zoom set.
If you were meaning the 106" was your diagonal measurement
then you would have 52" x 92" for your screen size. Your throw distance would then be from about 10.4 to 12.4 ft. Based on the calculator, a 122" diag. screen probably would be to big for this projector to get a great picture, as it does not have enough lumens for those throw distances. However, you would be fine with a 106" diag. screen or slightly smaller.
Z1 review
http://www.projectorcentral.com/sanyo_plv_z1.htm
Z1 calculator
http://www.projectorcentral.com/Sanyo-PLV-Z1-projection-calculator-pro.htm
