I usually start doing divebombs and crazy dime bag harmonic squeels when i'm drunk though :)
There is another good trem system that slayer use but i cant remember what it is. They said they prefered it to the floyd rose tremelo !
By virtue of their electrical properties, tubes generate a special waveform when they're saturated, which is why tube engineering has tremendous tonal advantages over solid state or DSP solutions, particularly for crunch and lead sounds. Tubes enter the saturation zone gradually or softly, which lends tube-driven tone its trademark yet totally unique character.