I have the MSA Sordins with the Gel Ear Cups, and they are good. Comfortable and well built. However, the Pro Ears Gold that I have are still better for noise cancellation.
I wish they would combine the construction of the Sordins with the electronics of the Pro Ears.
I have also tried the Howard Leights... they're good and well constructed, but I prefer the other two over the HL Sports.