The POD Farm is free, MDV. It was part of the Pod X3 but now Line 6 have raped them over with this free application. If you have the Metal Shop, you have models of a Triple Rectifier, Uberschall, Powerball, 5150, VH4, Einstein, etc., obviously they're models of the real amps. But you can stack two (i.e. Triple Rect. w/ Uberschall, which is what I use) and multi effects too. It's pretty much twice but as Tony says you can fiddle with it a bit so in reality you could get a better tone out of two rather than just one.