OK Lefty - seeing as it's you.
These are purely using vinyl and into the Sapphires:
1st. Exposure XV - it's ballsy, plenty of colour-differentiation (kit cymbals especially) and with bags of drive. The best of the 3.
2nd. Sony 770ES (lower impedence tap on the MC stage's SUT) - remarkably similar to the Exposure, and a big/full sound. More bite perhaps than the XV - think the extra power is helping here. Very close to the XV in drive and direction.
3rd. 42.5/Hi/110 - some way behind the above. Sounds thinner, hard to differentiate between cymbal colours. Hi-hat/rim shot patterns get lumped into one sound. Good fun though, and quick with it, but in a blind test you'd pick this amp out within the first bar of music. Just doesn't have the same
commitment as the other 2 amps. Still, it's a darn sight nicer than my old 72/Hi/180 and fun to listen to. MC stage is very quiet too - impressively so.