Please fill in this form with as much detail as possible and it should alleviate some of the back and forth e-mailing to determine what projector or projection system fits best for your needs.  Please note that the more information given, the better I will be able to help you. 

 Information that I must have in order to help determine an optimal projection solution for you are :

1. Throw distance between the projector and screen (or wall in some cases)
2. Screen size (or screen size that you want to purchase)
3. Amount of ambient light coming through the windows
4. A budget range would be good so that less time is used up in researching