I couldn't wait to get home today for some tube rolling. I only tried V-1. 1st was a Mullard IEC 12AX7. I was hoping to get blown away but I was not. While it sounded rich and had good low end, the highs were too laid back. 2nd was a Telefunken ECC83 that I robbed from an old Fisher integrated amp. Same results. 3rd was a Sylvania 12AX7 long gray plate. Sounded better than the rest in highs but a little microphonic. 4th was a GE Jan 5751. Kinda lack luster, lower gain. 5th Back in where it came from JJ ECC83S short plate. Sounds rich AND good high end. I was thinking about the JJ EC803S long plate but heard they were more susceptible to microphonics.