New options–
Standard
Intermediate
Expanded

My LCD works with all options. Expanded seems to make
the picture darker – I have the Elite w/ HDMI @ 1080p.

Anyone care to explain what this option is exactly and
what's the best option?

Read here about post #98.
http://www.avsforum.com/avs-vb/showthread.php?t=843417&page=4&pp=30