I've listened to a lot of your clips and think your Marshall clips are my favorite. Though, your latest uber clip was extremely killer. I bet the uber mixed with your jmp would be pretty sweet.
I use a 2204 w EL34's the same way. Sometimes I use a TS-9. Either way - Fn Killer. BTW, my buddy has a 78 JMP. Side by side with the same guitar they sound pretty much identical. As did my 82 2204 with 6550's. I know some people are not going to agree, but not a whole lot of difference between the EL34's and 6550's. As a matter of fact I could dial them in to sound very, very much the same.