What do you guys prefer? My Valve Jr. is modded to mimic the input path of a Marshall, so I'm looking for something to give me a Mullard-esque driven EL34 sound obviously. I'm currently running as short plate GE 12AX7 for the preamp, and it's sitting on top of a couple of Celestion G12T-75 speakers in a 2x12 open back. I've had great results with JJ's in my JCM 800, so I'm inclined to try one in my Valve Jr, but I can't stop reading great reviews on the TAD EL84-STR. Opinions?