Fender Champ. They changed very little from Tweed through BF. Changing the speaker from alnico to ceramic will brighten it a little but those few watts are loud little watts. For something quieter I prefer a VOX Valvetronix or an old Flextone III. The Roland Micro-Cube isn't too bad either, battery powered too. I imagine those little 1W Marshall anniversary amps that were really over priced are some of the best. The Fender Blues Jr has a lot going for it too with a MV. I'm guessing that you want good tone at low volume and frankly, I can get better low volume tone from the Mesa Boogie Mark V, in the 10w setting and the MV and V turned down than I can with the Champ alone... but add a good pedal to the Champ and it is a game changer. The Little Smokey is a pretty bad little amp too.
Don't forget about using Yellow Jackets in a larger amp to lower the output.
http://www.yellowjacketstc.com/ J