Brent Jessee does not have a retail office where you can buy tubes on site.
I have had several Rogue Audio products before and I suggest that the stock JJ tubes not be so quickly dismissed.
With the cronus magnum the amperex preamp tube sounded best but needed an rca or jj tube in another position to balance it out.
with the two buffer tube rogue pepreamp i had, the jj did sound the best overall- dynamic, clear midrange, excellent bass, smooth detailed treble once burned in. the jj tubes take a long time to burn in, some people reporting 400 hrs or so.
i have tried pretty much every nos 12au7 including mullard, telefunken, siemens, amperex, rca, ge, mazda, philips, etc. also gold lions and tung sol reissues. the jj work very well in rogue products.
since you have a bunch to try, go ahead and listen to them. take notes and try to use some demo tracks to evaluate them with the same music.
fyi rogue tube sockets are very robust, i wailed on my cronus magnum over the years and never an issue.
the jjs sounded best in the rogue pharaoh, big brother of the sphinx.
dont overlook them.