I have a Danelectro coolcat chorus which is lovely, miles better than the AD30 built in one, and can be had for cheap. Built like a tank too. Mines one of the 18volt ones with 2 batteries. I used to have an Ibanez cs10 chorus which was also excellent and well worth a look for - apparently the same circuit design as the fabled cs9 but in a cheaper case/hardware. These can be had for cheap as well.