Aestheix Calypso owners,tube advise needed


Just bought a 1 year old Calypso and need some suggestions.
I am biamping with Pass Lab Aleph 3s into Audio Physic Virgo IIs. I listen to Jazz, Rock and Blues. I have some nos Sylvania 6DJ8 with large yellow lettering with no other info and in the 12AX7 slots????.
gandme
The best I have used and currently use are white label Amperex 6922's (late 50's/early 60's vintage) and Mullard CV 4004's in the 12AX7 slots. I also have the notorious Mullards 10M gold pins (12AX7), but found them to be a bit slow for my tastes.

Strongly recommend you buy from a reputable & knowledgeable tube dealer (Brent Jesse Recording, TubeWorld, & Vintage Tube Services). It may cost a bit more, but you'll know your getting the real deal.
Pdreher- Thank you for the advise...I don't know much about the tube world and I am interested in the difference in tubes(input stage vs output) and how they can change the presentation of solid state amps. My Aleph 3s have a very natural sound compaired to most s.s. amps I have listened to. Should I consider this as a factor in my tube choice?