Either the Hobbico Microsizers or Bit Char-g's, but these are both the same damn thing except Bits are JDM sort of (well they are assembled in chinese sweat shops but its a Japanese company.)

Both Microsizers and Bit Char-g's are made by TOMY, and everything else are what they call "clones" aka rip offs. Some clones are crap others are as good as the TOMY stuff. A lot of the stuff is interchangeable.