ARC D-115: What tubes and cables?

Agree with Rrog SED's, Winged C's, 6550WE or Philips 6550. The amp was voiced with the Philips. Prefer the GE 6FQ7's for stock. RCA Black Plate 6FQ7/ clear top for nos. If this is a D-115 plain and not the MKll, 7308's instead of 6922's for drivers.

You can't find real new old stock 6550s anymore. There may be a precious few here or there but the cost will be comensurately high. I don't know why you guys don't like the KT-88. It is a very good tube and the current production Gold Lions produce beautiful music in the systems I have used them in.
If you insist on 6550 output tubes they will also have to be Russian. I don't care for the 6550 sound so I can't suggest one over another. I think I have an amp that has EH6550s in it. It is in storage so I can't say for sure. I didn't like them that much I remember.
The drivers are another story good NOS should be "findable". Has an yone thought about using the KT-120s in an older ARC?

Thanks guys, this is the first tube amp that I've owned.
Prior to this, I was using an ARC D-120 that simply got out
of the way and made my Proacs really sing.
However this is an entirely different beast! (LOL)

I always used 6550 tubes from ARC with this amp.
In your header you also ask about cables.
I found Purist Audio to work extremely well

Goldeneraguy, I was using Radio Shack 18ga solid core cabling with the D-120. (No kidding). So Purist seems like a gigantic leap. Any other sugestions?