I have an EH Small Clone and a Carl Martin Chorus XII. They are both very different chorus sounds. It depends on what you are looking for. The Carl Martin has two switchable Chorus, with a depth and speed knob for each.
It is a very transparent chorus. (think Eric Johnson, TC Chorus sound). I love it because I can set one of the chorus to a real light chorus and the other to a really heavy Leslie type chorus sound. It really does not color your original tone.
The EH Small Clone on the other hand is a very strong chorus. Definately colors your original tone, but you can get some really wild sounds out if it if thats what you are looking for...
http://www.inrerocknroll.com/tunes/PR.mp3 Just get the Analogman. Not only is the most musical and least cheesy chorus I've come across, it's got to be close to the quietest analog choruses out there. It beats a lot of the "notoriously quiet" ones like the TC Electronic SCF.