TADAC owners - which best 12au7 tubes?

I have used Mullard CV4003 in my TADAC. I bought them from upscale audio. this is their page for CV4003 with reviews at the bottom of the page. I am not good at writting what I hear so the reviews echo my own feelings on these tubes.

http://www.upscaleaudio.com/product.asp?itemid=12&catid=44

I just ordered a TADAC and would also appreciate input from other TADAC owners.

Thanks!

I have owned one for about 10 months. I first switched out the Chinese tubes for a pair of French Mazdas, recommended and bought from Brent Jesse. After about 200 hours of break-in, I noticed an increase in soundstage. About another 200 hours later, the soundstage had really opened up.

Looking for Nirvana, I bought a pair of Tele smooth plates from Brent Jesse again. I'm still in the burn in stage (about 250 hours), but find the detail a bit better than the Mazdas, but the soundstage has a way to go.