Tube recommendations

No rush...I just thought I'd inquire for future reference.

I suggest you call Andy at Vintage Tube Services. He can help you with tube selection

While I'm guilty of tube rolling and have favorites, without knowing the pre you have and the type of sound you prefer any advice I (or any of us) could give would be a shot in the dark.  So what pre do you have?  And what change in sound are you looking for?  If you call Andy at VTS, he can certainly help you, but you'll need to answer those questions for him  as well.

@jperry @rcprince Thanks for the info. I'll contact him.

I currently have an Octave HP700. 
I'm looking for a lower noise floor & increased detail. 
Just to reiterate this concerns the phono stage module. 

I’m looking for a lower noise floor & increased detail.

It’s all about vintage Telefunken Military Tubes from the 50s, 60s, 70s
My target was exactly the same when i upgraded, i have upgraded quickly and there was no reason to wait, it was huge upgrade over the stock modern tubes.

You have to understand that NONE of the manufacturer of the modern amps, preamps, phono stages will supply you their gear with NOS vintage tubes, some of them are impossible to find even for tube dealers. And each NOS tube must be selected, cheched by the seller and compiled into a matched pairs, quads etc. This is too complicated (another reason why they are expensive).

You can’t go wrong with the genuine Telefunken tubes in NOS condition, everyone will tell you this, but there are many other brands in UK, USA, Japan to compete with German Telefunkens.

I was happy with Sylvania Gold Brand 12at7WA with gold pins (made in USA) and the price was much lower than Telefunken, the sound was warmer and not as much detailed as the Telefunken tubes.

All i have said applied to the ECC81 / 12AT7 types

Modern amp with great NOS vintage tubes compared to the same modern amp with modern tubes is completely different thing! The only problem is the cost of that old NOS tubes (selected by honest dealer).