New Champion/PES GP7s
#21
#28
Tony's website is listed off on the right side banner under GP7. You can get more info there. I don't think they are lighter than Dymags but they seem to be sturdier.
#30
Getting them mounted in the AM. I think they are far superior to dynamags on every front. Dms may be a little lighter, but not nearly as strong, plus they leak air from what I've heard.