whirlwind
Headphoneus Supremus
I think I will grab a pair of 5998 while I have the cash and explore the 6080's later on.
Heck, I do not even have my OTL yet....I am just getting ready
You would be very welcome here
http://www.head-fi.org/t/410326/for-6as7g-tube-rollers-here/1830#post_11426714
In case you have not seen it take a look at Nick Tams excellent assessment of the top tier 6as7g/6080 tubes 5998, WE421a, GEC 6as7g, Bendix etc the pics have disappeared (only recently) but its still very handy for reference and you can always google up a image of the tube in question.
http://the-key.enix.org/~krystal/review-tube-bottlehead.html
Thanks, for that link.