Peavey (AlienConnections team ) just produced Revalver 4 plugin.
One of the interesting thing is you can Tone match your input to desired spectrum (Acoustic Guitar, Telecaster .....and so on) it is called ACT :
I wonder if it possible to do the same in the KPA FX ?
Other nice things is - you can tweak schematic of the emulated amps:) This is based on the SPICE simulation.
Nice plug in. I have sentiment to the Alien Connection stuff. They have a nice spectrogram editor in the pristine studio.