Torpedo Wall of Sound III | Two Notes Audio Engineering
And doesn't require a damn iLok dongle anymore either. Basically, the free version has two cabs, 8 mics, etc. and then each additional cab can be purchased in-app for whatever 7 Euro is, which I think is $10-ish right now. Not bad. It also handles 3rd party IR's.
Oh, kickass. I may check that out.
The poweramp sims I assume are so you can record from the FX send out of an amp head?