If you can spare $400+, try the small 3w or 5w tube amps, either Blackheart (yamaha) or Epi Valve Jr combos (Swee Lee). They're solid, lots of us love them, and has good resale value (i.e. next time you wanna upgrade or get rid of the amp, can always sell quite easily). If you want it for cheaper, can wait for a good deal on Soft forums, there's so many good 2nd hand deals everyday (**salivating!!! )...
There are cheaper solid state types like Smarvos and even the small marshall combos but you pay for what you get lah.. not much resale value either