I'll try to remember to take a photo of the stock sockets on my WA3 sometime this weekend (assuming no one beats me to the punch). My anecdotal experience, having used the amp daily for the past two years, is that I can't identify any issue with the stock sockets that would suggest a need to upgrade to teflon... Gold plating is nice I suppose, but many of the "best" nos tubes don't have gold pins. In any event, if it were my money, I'd save it for a TS5998 and a nice pair of nos amperex, siemens or mullard ecc88's(aka 6992's) or e188cc's (aka 7302's). The latter are good for 10,000 hours, so it is really a question of how often you are going to be switching them up for the simple sake of variety.
Edited by skeptic - 11/5/10 at 11:51am