What is the best tube preamp currently available?

Folks - It seems my Golden Tube Audio SEP-3 is finally dead and no support or schematics is available in the entire industry. I am forced to consider a new preamp. I am spoiled with its wonderful tube quality and thought you folks would be the perfect forum to start this research for the perfect replacement. I am primarily stereo based, but would consider an A/V tube preamp, if within my budget. I look forward to your recommendations.
Thanks in advance! - Bill