The Peachtree amps, as mentioned by uberwaltz, are a good option but they are not tube amps.
There are many good, inexpensive tube amps available that are certainly more than good enough for bedroom use. I would suggest that you take a look at the *original* Sophia Electric Baby Amplifier. It was a killer product that was designed by a U.S.-based audio firm (although the amp was made in Hong Kong). These are available used for around $350 and I doubt that there there is a better performing tube amp at that price. Replacement tube sets are very inexpensive, these units are built like a tank and they are easily modified/upgraded if you are so inclined. I used one in my office for years.
There are many good, inexpensive tube amps available that are certainly more than good enough for bedroom use. I would suggest that you take a look at the *original* Sophia Electric Baby Amplifier. It was a killer product that was designed by a U.S.-based audio firm (although the amp was made in Hong Kong). These are available used for around $350 and I doubt that there there is a better performing tube amp at that price. Replacement tube sets are very inexpensive, these units are built like a tank and they are easily modified/upgraded if you are so inclined. I used one in my office for years.