As an opinionated person, I would be looking to build something that incorporates the screen and handles hiding the main speakers you have up there. They are a huge eyesore IMO and something I would like to see go away as part of the upgrade.
I stole this from the Infocomm website...
"For general video and PowerPoint viewing, 8:1 is recommended.
For reading spreadsheets and websites, 6:1 is recommended.
For inspection of visuals "without clues" (maps, drawings, medical charts), 4:1 is recommended.
So, if you are just viewing PowerPoint, 8:1 is fine. However, if people in the classroom are showing websites and expecting people to comfortably read them for hours at a time, 6:1 is recommended."
Those numbers: 8:1, 6:1, 4:1 are viewing distance to screen height. So take your 60' maximum viewing distance, and divide it by 8, 6, or 4 depending on the type of material to determine the proper screen HEIGHT.
Going on the low end, 60/8 = about 8' tall screen height. Going to the middle, a 10' screen height is recommended.
I would go with that size and likely you will be in a 16:10 format.
That's a 16'x10' screen - or 160 square feet. You want a very real 50 lumens per square foot to fall on the screen. It sounds like you have some light control, and you can use a minimal gain screen to increase brightness a bit. But, you want to throw a lot of brightness at this size.
You also MUST HAVE a tab-tensioned screen which is going to add to the price. Much like a shower curtain always has waves in the material, a non-tensioned electric screen is about the biggest waste of money out there. I would go with a cheaper/less bright projector for the short term - maybe not fill things all the way - instead of going cheap on the screen. A good screen will last 10+ years easily. A cheap screen will look bad in 2-3 years.
I would add that the projector you looked at was a VERY inexpensive and bright 1920x1200 projector. But, unless you plan to put up detailed maps, you don't need that resolution as a requirement.
Keep that in mind... You need 6,000+ lumens. You MUST have that light output, so you can't go down in price and really expect that quality when you are starting with about the least expensive solution.
I would look at this list...http://www.projectorcentral.com/projectors.cfm?g=1&hide=0&st=1&mfg=&p=2500&p=10000&w=&r=&br=6000&br=12000&ll=<g=&t=&db=&dt=&c=&ar=Wide+%2816%3A9-10%29&dvi=2&wr=&pjl=&pjw=&pjh=&td=&i=d&is=&sort=%24&sz=15
This one would be near the top of my recommendation list:http://www.projectorcentral.com/Panasonic-PT-EW730ZU.htm
It's not a 1920x1200 projector, but it has the light output you actually need and includes a lens for that price. You can get it without any lens, then order the lens you need for a specific throw distance if you would like.
You will need to figure out sources, and budget for HDBT extensions for the system as well.
While you can get models at and beyond 8,000 lumens, it almost doubles the purchase price to get only about 15% more brightness, and isn't worth it really.
- Theater, whole house audio, and technology consultation during the build and installation process in the Washington, DC metropolitan area.