Rainbow Effect
Hi sts9fan,
Unfotunetly, I do see the rainbow effect. If you are looking at the screen and move/scan your eyes quickly to the left or right you will see a quick prism line within the center or corner vision. This does not happen for everybody. For me it doesn't matter if it is an enclosed tv unit or full projection.
As for the lip sync problem, definitely try a center channel. The others here will let you know if that is the wrong advice for the lip sync problem.
Bryguy.