The Viscount is a horrible sounding, unreliable amp, although it sure looks great.
As a kid, we naturally all wanted Vox gear, but there were no guitar mags around to inform us that the American amps were shit, and the British amps were THE shit. It wasn't till much later in the game that I realized how great the British AC-30s really were. Now, they're of course legendary...
I recently stumbled upon a Viscount in mint condition, and it really sucked. I own a few British AC-30s and 15s, and this thing really pointed out why that company went down the tubes in the States...
I was easily able to sell the Viscount, though....600 bucks if I remember correctly...