Okay the Grey Glass GE 6DJ8 is now out after 20 plus hours of critical listening. Someone looking for a more balanced, less warm tube in this DAC the GE brings a full spectrum sound to the table at a reasonable price (can be found for less then $20 online).
I've replaced it with a Amperex ECC88, white label, Made in Holland in 1966. Impression with just a couple hours in so far: warm, detailed, relaxed and very Philips like.
Wb