No offense taken Mrstark. Thank you for your concern.
At the risk of staying OT a little longer, I see where some people might really enjoy tweaking and twiddling. That's totally valid. Still, for every tweaker that gets great enjoyment out of tracking down the best tubes for his or her amp or preamp, there's at least one non-tweaker, like me, that just wants great sounding equipment right out of the box and doesn't want to do anything but listen to music for the next ten-years or so.
So, I'll stick by my guns, IMHO, tube rolling is not an advantage of tubes vs. SS, UNLESS you really have a need to do such things and it makes you feel good, then I say, "Have at it." ;-)
I'll admit, I tube rolled my Woo Audio WA6 headphone amp. So shoot me. I'm not proud of it. I did research for weeks over at head-fi.org and then searched for weeks for a reasonably priced tube and then I struck, only one. I'm pleased with my upgrade. Jack Woo makes no bones that he offers the amp with compromise tubes and other circuits in order to me his mid three-digit price point. He offers upgrades. The expense was small in proportion to the rest of my system and my headphone setup is a much lower priority than my speakers. Hence, I fell off the wagon just this once.
Dave