the 4 stage mode sounds killer
reminds a lot of both of my own amps (a totally rebuilt high gain '73 Marshall JMP and a Zambelli Hyperdrive, which is also a 4 stage + CF hot rodded marshall)
my amps are very different from each other, though (the JMP is FAT, smooth and very open sounding, while the other is focused, metallic and saturated), but yours displays the best of both :D