I know the original Lumenlab design is for a 15" LCD so what im wondering is am I going to lose some light if I use a 17" LCD. My room will perfectly dark for projecting and im going to be Using the Pro Zoom lens kit. I really want to use one of the two below so if anyone has stripped them with/without problems id like to know. Also Is their a huge difference between Analog vs Dvi connectors on LCDs, is it important enough to give up 12ms for 16ms?
Thanks

BENQ FP757BS12
1280x1024 Max Resolution
260 cd/m2 ultra-high brightness
450:1 ultra-high contrast ratio
12ms response time
ANALOG

BENQ FP791
17.0" SXGA 1280x1024
Screen Size: 17.0"
Max Res: 1280 x 1024 / 75 Hz
Response Time: 16 ms
Pixel Pitch: 0.264mm
Contrast: 450:1
Brightness: 400 cd/m2

The pro lens kit will work just fine for 17" lcds...you wont loose any light. it will work great.

There's always a huge difference between analog and digital. It really comes down to rather or not those differences effect you. Digital is NOT always the way to go. What are you planning on doing with your PJ and what devices are you going to hook up to it?

Im mostly watching movies but im also looking to play some games. I want to eventualy hook up a N6 to it as well.

What i want most out of it is to make the biggest image i can, is a 17" lcd better for size?

There is nothing wrong with the analog, and passing up on the DVI connector in my opinion. In general, yes the larger the LCD, the larger the projected image can be, but there are several other things to take into account. It is highly possible that I could get a larger/better image with a smaller LCD, assuming it was superior to yours.

Having said all that... both of those look like great LCDs (according to your specs) to me. You will more than likely get wonderful results from both as well. Now the BIG reason that you're going to get bigger and prettier images from the 17" LCD over the 15" isn't the extra 2 inches. The regular optics will not work with the 17" panel, you would have to get the Pro Lens Kit which allows more light through and has a better throw. Keep in mind you can use the Pro Lens Kit with 15" panels as well, but not the other way around.

15" panel = regular lens kit OR Pro Lens Kit
17" panel = Pro Lens Kit only

I don't know if any of this helps, but hopefully somewhere in my jabbering you got something useful.

Thats what i wanted to hear sir ! thanks for the help ! I have the Pro Zoom Lens kit on order since late august but i can't make up my mind about the 17" or a 15" , the 15" was the Benq with 16ms response but the 17" are on sale for september... stupid choices!

Thanks again

Oh by the way, Does any one know how big of an image the pro lens kit will produce? specifically at 16ft away. 12ft by 12ft would be great or is that too ambitious.

At 16' with the lens set to the largest image size your image would be 14' diagonal. That equates to 11.2' wide and 8.4' tall in 4:3 mode.

What is the biggest image you can make with the Pro kit and 17" or 15" Lcd?

Side of a house? The only limit is brightness.

Freaking Sweet !

If I can get a 15" panel with SXGA 1280x1024 resolution is there any advantage to using a 17"?

I supposed this could be debated as to what you consider an advantage. It really depends on what you consider the important factors. You might want to compare other attributes such as contrast ratio, brightness, and response time.

If it were me and I could choose between a 17" and a 15" with the same specs I would choose the 15" for this project. I think I would opt for the Pro Lens Kit though. Take a look at the features I mentioned and the price points and decide from that.