My genuine opinion is get the Digitech Hardwire CR-7 Stereo Chorus.
heres a cheap one for sale:
http://www.dv247.com/invt/49102/
I tried one yesterday in a store, and i bought a used one today online.
i've had quite a few choruses and this might be my favourite, Its also one i would recommend to first-time chorus buyers and weatherd fx fiends alike.
main +'s:
7 different chorus modes, and they all have their own character.
The level is a blend, rather than a master volume.
Simple controls: Speed and Depth.
between the modes and the other controls, i think you could get whatever chorus you wanted.