Hi guys- I've been off this forum for a while, and I've come back because I'm doing an across-the-board upgrade of my setup. I've purchased a Panasonic ae-8000u 3d projector, and the seller added 2 pairs of Xpand 3d glasses to the bundle. I've been looking on Amazon at the 3d glasses, and they range from $20 to >$100 for active shutter glasses. There is very little in the product descriptions about what brands/ models they are compatible with. I don't expect to use the 3d a lot, but when I do, I'm likely to have more than 2 viewers, so I'd like to get at least 3 more pairs. Does anyone have any experience with the cheaper versions?