A Prima Luna prologue 2 is currently for sale on the gon. This one has Gold Lion re-issue KT-88s in it. I happened to be an EL34 fan as well, but found this tube to have exceptional midrange presence, frequency extension and rich tone without the SS like, bang and sizzle,"hole in the middle" sonic, that some of the 6550s/KT-88s have. The Prima Luna has a very high quality fit and finish and has been well recieved.
I have no affiliation with the seller or Prima Lina.
I have no affiliation with the seller or Prima Lina.