Archon 50 demo with clean and some dirty + playing with backing tracks. He shows it in heavy territory at the very end.
Archon 100 reamped in a Conquering Dystopia track. Apparently no boosts were used in reamping, so sayeth Keith Merrow.
I can't find any high quality play-through videos with backing tracks using the Lil Fokker. Someone should immediately get on that. Here's one walking through the channels, though.
And since the KSR Orthos was mentioned:
I'd like a full play-through with the Orthos to check out the clean channel.
As previously stated, I don't think you could go wrong with either amp.