Whadja get? Is it an autobias amp or one you would have to bias yourself? If you have to do it yourself, you will NEED a multi-meter at some point, and/or a friend to guide you. If it is fully autobiased and the amp doesn't 'eat' tubes, what you really need is time to listen :^)
Extra tubes are OK, but it may be premature. You are better off learning the foibles of the amp with regard to your speakers, your upstream components, and tubes. That takes time, but I expect you won't be overburdened.
Extra tubes are OK, but it may be premature. You are better off learning the foibles of the amp with regard to your speakers, your upstream components, and tubes. That takes time, but I expect you won't be overburdened.