Yes EMADS are compareable to superkick (although not quite as good IMO) but not powersonic.You should definitely consider checking out the EMADs. Several different options available to fit your needs.
Have to put in my two cents here. I bought a SK2 because my buddy told me it was the best, well I guess I was expecting the best and IMO it certainly was not. Sure it's a durable head but unless you play it miced you can't hear it.. I played it at home and the muffling was too much. I could hardly hear it. PS3 all the way, or an emad 4 or 3. I figure get a head with less dampening, you can always add but its hard to take it away if it's already built in.. Hear what I'm laying down?