I'm currently looking for a speaker for a Carvin Vintage 16 1x12, and it's pretty much between the Celestion Greenback G12M and the G12H30. I'm more drawn to the Greenback because of the lower sensitivity level and because I like the sound better judging by sound clips. But the problem is I've heard some bad things about how Greenbacks sound bad in open-back cabinets and that the reissues are harsh sounding compared to the originals. I wonder though if they let the speakers break in first before reviewing, but anyway, if anyone has used Greenback reissues, especially in open-back cabinets and can comment on it, that would be great.