Schiit Saga which tubes to order?

The Yggdrasil is worth the extra money imo 

Low rider I appreciate it. I’m a newbie and am getting an education.

I think the "real" Amperex tubes do have some sort of magic.  However, it is going to be hard to find a real Amperex and there are many different types and releases of the Amperex 6sn7 tube.   If you can find a real Holland made one (or even a USA one).  Alternatively, I would go after the PSVANE CV-181 as the most magical sounding and highest resolution currently manufactured tube.  Definitely as expensive as some of the Amperex, but you know you're getting a good tube.

My Schiit Saga came in the mail today and after several hours of listening, I am extremely pleased. I had been using My NAD C326bee’s preamp section with my Nuforce sta200.
What a difference! It sounded like a vale had been lifted from my Zu Omen’s. There wasn’t a huge difference between the passive and active preamp, but I plan to buy the Early Russian 6H8C from Upscale audio in my search for a tad more warmth. What a great little preamp for $350.00. My next step is to upgrade my Peachtree Dac-itI and some interconnects. I appreciate and welcome all  comments! Thanks again!

That's great news!!  How do the stock tubes sound in your system?

I have a pair of the early Russian tubes from Upscale; a good price for some very decent tubes. Kevin's description is spot on; an "airy" top-end and very revealing.
   If you want to add some warmth, try some early RCA 6SN7GT's or GTB's. They have that classic tube sound with wide soundstaging and great dynamics. Very organic.