From what Dolby says, the PLIIz is supposed to be even better with games than film. So that's your next mission.
Really, I'm happy to hear this report from you. I'm far from being able to have 11 speakers, but will surely be running 9 before too long. I definitely have more room for heights than widths (9' ceiling, but the room is only 15' wide). So that's were I was planning to go, and feel even more comfortable in that choice now.