Join Date: Apr 2005
Location: British Columbia
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I'm using a Sanyo PLV Z3 in a 19 x 14 dedicated HT, fully light controlled. The Z3 has a slightly lower ANSI lumen rating than your HT1100 does in eco-mode. I'm currently using a 110" DIY screen (Glidden "Misty Evening" painted on drywall).
I did a good job on my DIY screen, but the gain on this painted wall is undoubtedly lower than the CCW. Despite this, with ~ 400 hours on the lamp, this screen reflects a very nice image with the Z3 in one of the least bright lamp modes ("creative cinema"). As the lamp ages, it will undoubtedly grow dimmer, and a better screen will be required.
The Projector Calculator at ProjectorCentral.com says you'll get a fairly bright image (20 foot-lamberts) with your HT 1100, and a 110" screen with a gain of 1.0. Mine is probably ~ 13 fL with my lower-gain screen.
If you're planning to buy a screen that is 110" or less, you normally view in a completely dark room, and your walls are dark, it's very unlikely you'll need the BW. I think you can stick with the CCW unless your screen is much larger than 110" or you like to view with a light on.