For the record, Groove Tubes has a new preamp tube out called a 12AX7M.  They are exact replicas of the much sought after Mullard ECC83/!2AX7 magic tubes.  
They are just now hitting the internet tube guys.  They're about 20 bucks a tube.  Groove Tubes is making a nice move lately.  They've also got some big bottle EL34's being made now with their own equipment.  
Their 6L6GE's are awesome replicas of the General Electric 6L6's, even made with teh same equipment they bought from the old GE plant.
I love NOS tubes.  But, I also think we have a responsibility to buy new ones from companies that are investing in new equipment.  (as long as the product delivers on the promises!)
I've yet to try the new mullard 12AX7 copies, but I'll be ordering some soon.
Just my two cents.  Buy what you want.