They're the only one's I have heard of to currently not show rainbows. I would think that manufacturers are catching wind to the rainbow issue and will start coming out with better glasses. If there was a quick fix I would have been doing it. I think the CE5 glasses are going to keep coming down in price as more competition enters the marketplace. They went from $600 to $400 to $175 over the course of the year.
The xpand x104 universal glasses that are coming out shouldn't show rainbows because they can be used with lcd screens using IR so their lenses will be in the correct way but they are going to be like $250. They will be IR and DLP Link compatible. They should be good about blocking the flash and not showing rainbows. They could completely screw it up though.