Yeah, tube rolling is so much fun. I remember how shocking it was when I plugged in the 7308's in the T1 a few months ago. It was so different and so unquestionably good, coming from the T1's stock tube. Everything was so much smoother, the soundstage was so much bigger and more realistic.
I just recently scored some vintage platinum-grade Telefunken E88CC's for my LYR, and the sound is like pure happiness flowing into my ears. They are still burning in, and it feels like they get twice as good with every listen. I can't imagine what they will sound like a month from now!