In my cat biased El84 amps, I have been using TAD. If you can afford two sets (as you have found out, you need spares for just this reason) I would try 2 different brands and see what you think. Don't trick your self into hearing something that is not there. If the difference is not obvious to your ears......don't sweat it.
Take a look at:
KCA NOS tubes
Doug's Tubes
Tube Depot

I'm not sure how ted rates his speakers. Or if the 30W rating on each of them is just RMS.

I like to play at the edge of breakup, probably install a VVR circuit as well.