Pfenning,
As Grainger sais, is it is all up to your own listening preferences. If you're more or less happy with what you have, I myself would tend to think about upgrading the 2a3s to the JJs as you stated. Every 2a3 amp I've had has benefitted substaintially from these JJ tubes (though I still have to give my EML meshers a try.)
If you go with the CBS Hytron 5814s, the best of the bunch are the mid-50s with the red labels, though they are, and have been, hard to find the last couple of years. That said, I'd tend to think of them more as a different flavor or possibly an incremental upgrade over the cleartops -- depending on what kind of presentation you prefer. At this point I also can't fully recall what those differences were, but I ended up leaving the CBS Hytrons in place.
Hope this helps,
Jim
Jim Rebman -- recovering audiophile
Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).
s.e.x. 2.1 under construction. Want list: Stereomour II
All ICs homemade (speaker and power next)