Let me throw my two cents into the drain,
Correct me if I'm wrong (nah, that'll never happen on a forum like this huh?!), but I'm not seeing complaints about the new (-002?) lamp version from JVC. Assuming that is correct then going forward you shouldn't worry about lamp supply disappearing because the 2012 models are using the same lamp as the 2011 models.
I also have a 30% gain screen (Da-Lite Cinema Vision - 1.3 gain, 110" with 21.5ft throw distance) and found 12FL to be plenty (my readings back in April: https://www.avsforum.com/avs-vb/showt...2#post20366102
) and that was in a big room with less than ideal light control.
When I tested some 20 screen samples before choosing the CV, I subjectively found some screens performed quite a bit better than others with ambient lighting or a couple room lights on. For example, while StudioVision was excellent in the dark (and my preferred choice there), it was near impossible to see anything with some lights on. Likewise, the extreme field of view and brightness falloff of some other screens (like the HP) were far less consistent than the CV.
There are a lot of factors that contribute to the need for more or less brightness than sheer FL/lumens.
If you are in a bat cave and find 14FL insufficient and insufferable, then yeah, maybe go DLP or keep waiting for LEDs and lasers to replace the current lamp tech.