To all you Cary SLI 80 owners, I'm looking for tube suggestions

I was hoping you would catch that. Looks like Glennewdick has the inside line. I haven't used the KT77s yet but have used the KT-88s. I guess my favorite EL-34 is the Tesla. Quicksilver has some but don't know if they will sell them to non-Quicksilver customers.

@russ69  , I don't want to hijack the OP, but since I run a dozen EL34s in my Cary V12, I always paya attention to the EL34 threads.  (Currently I am running my 3rd set, which are the reissued Tungsols that I bought from Jim McShane back sometime around 2020, and I like them, but when replacement time comes I am looking for something else).

Anyway, I did some quick googles, and now Tesla is a branch of JJ?

Thank you guys for the info and input. As it stands the current factory tube set is just fine. My thought is that since Cary made the rectifier section solid state, what I’m hoping for is a bit more warmth and sweetness in the mids and highs.

I usually buy my tubes from Viva tubes, they are rear to deal with, however if there are other vendors as already mentioned, I will definitely check them out.

I prefer RAM Labs EL34's over RFT EL34's and Gold Lion KT88's.   The RAM Labs are a steal @ $140 for a quad.   Using NOS Amperex 7308's and TungSol 6SN7WGT's from Brent Jessie.

BTW, Cary said to keep bias < 50mA when using EL34's.

Anyway, I did some quick googles, and now Tesla is a branch of JJ?

The old Tesla are not the same as the new JJs. Cary used Ruby tubes on my six-pacs but those exact tubes aren't made anymore. Not sure what to say, sometimes you just have to give a new tube a try.