I suspect these are speakers that would not test well, especially at high levels with bass rich program material, but which sound very appealing at moderate levels. Only an audition will tell, so who's going to bring a pair to the Lone Star Audio Fest next May?

Regarding the stamped versus cast frame, cast is better, but it's also more expensive. The Silver Iris with a cast frame would be be quite a bit more expensive, and out of the reach of people who are now enjoying it.