I would appreciate your insight on the Super 7. I am still very much inclined to get one, particularly to use with my HD800. A number of negatives have, however, surfaced recently. (i) Apparently its initial perception of improving the tonal balance of the HD800 was due in part to a source with some imbalance. (ii) There have been few reviews of the amp from RMAF, and those have been polite but little more. On the other hand, as you point out, the tubes on the Super 7 were inferior; and Craig did not have it paired with an HD800. Also, you have apparently been able to achieve much better results with tube rolling, even though you were using a decent source. If you have any other pros and cons, observations, or whatever, I am all ears.