I have the new 3B and love it. For new tubes go to the Audible Illusions web site. I have found the tubes they recommend will last for 2 years or longer.
http://www.audibleillusions.com/
They also offer an upgrade program and will rebuild your preamp from scratch into the 3B for about 50% of the cost.
All the best!
http://www.audibleillusions.com/
They also offer an upgrade program and will rebuild your preamp from scratch into the 3B for about 50% of the cost.
All the best!