What about JJ KT88 tubes?

I've got a quad of JJ KT-88 outputs in my Image 65i. They've been in service for over a year with zero problems. Bias drift has been minimal. I've been very pleased with the sound quality.

I've been using JJ KT-88's in my Quicksilver V4 Amps (4 per channel) with no problems. No biasing issues as well. Sounds great.

Have used JJs , SEDS and GL reissues, I prefer the overall sound of the GL Reissue to those , no problems with reliability. That said, and while it is your choice on seeing the inside of the tube, the Black Treasure to my ears betters the rest, ex the Psvane which I haven't used, by far musically. If it is the music you're after, suggest a listen to the BTs

Thanks for the inputs all. I have been using the JJs and have been pretty happy, but am always looking for something better. The system is my 2d system in my bedroom. I have used the Treasure 6SN7 in my main system, and I really do like the sound (and these are teh blue glass prototype version, not the better black bottles). Appearance was a major factor in the amp selection, as I thought it would look good with my old art deco furniture, plus it had gotten a lot of good press. I was happy to see that at night, the tubes cast a big V-shaped patch of light on the wall, looking very art deco. Since this is a second system, I'm willing to sacrifice some sound quality for appearances, although I would like to choose the best sounding tube that still looks good.

Try the SED 6550. I like the JJ, but the sound of the 6550 is even better. The GL is a bit compressed sounding with my amps. Not a bad sound, just a little un-dynamic. I like the SED 6550 first, next the JJ, next the Sovtek KT88.