If you need only a power amp, check out the PrimaLuna Prologue Five, which has auto-bias and allows tube rolling of many power tubes. It's not the most powerful tube amp but it plays beautiful music and, as tube equipment goes, is remarkably user-friendly and trouble-free. An excellent value.
If you need an integrated amp, there are a few used PrimaLuna integrateds currently for sale on Audiogon, including an especially tempting offer from user kuwarbis, though his ad is about to expire.
I speak from experience with PrimaLuna equipment. Gorgeously musical. If you prefer a more muscular tube sound, keep your eyes open for a used Rogue Cronus integrated.
If you need an integrated amp, there are a few used PrimaLuna integrateds currently for sale on Audiogon, including an especially tempting offer from user kuwarbis, though his ad is about to expire.
I speak from experience with PrimaLuna equipment. Gorgeously musical. If you prefer a more muscular tube sound, keep your eyes open for a used Rogue Cronus integrated.