I'm thinking about getting a small tube amp. I came across this chart that shows some amps that would be in my price range (around $200)

I'm not sure if any of those would have the amount of gain I'm looking for. The one I'm most interested in is the Vox Lil' Night Train. Any opinions on how the 12AU7 output tube compares to a single 6v6 or el84? Or any other high-ish gain little tube amps I'm missing?