Newbee's advice is excellent. Another thing I might mention is that, while I do like the NOS tubes, particularly for their longevity and the fact that my Jadis equipment was originally designed when they weren't NOS, don't automatically dismiss the tubes that come with your equipment, particularly newer designs. Give the equipment some time to break in and get used to the sound before you do any tube-rolling. Many newer designs were "voiced" around tubes that are available today, and can actually sound better with the tubes they are supplied with (a friend of mine found that out with a Cary integrated, where he was disappointed in the sound when he put in the NOS tubes for which he spent a pretty penny and wound up staying with the stock tubes). So be patient before you start spending on the expensive tubes, they might not always be a sonic improvement.
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