Where do you guys buy tubes?

Vintage Tube Services and TC Tubes.
Ebay for the odd ducks (6C33C-B and 6350) that I then send to tctubes for testing.

Question for Atmasphere:  Do you think JJ has resolved quality problems?  I had some KT88s from them a while back.  They sounded great but did not last.  Failed in a damaging way to the JoLida integrated I was running at the time.  I'd be pleased to hear they've resolved those issues, though I do note some of the suppliers above (Jim McShane & Kevin Deal) still do not carry any JJ product.  Just curious on your read of that situation.  Thanks.  

I typically buy vintage NOS tubes from Brent Jessee, service and quality are top notch. 

Www.audiotubes.com

Upscale Audio. I was satisfied with Kevin Deal's expertise and the care he took where tolerances were particularly tight with my equipment.