I wouldn't get an ICS, I've seen so many ICS guns break internally. Stick with either TM or CA, but what warlock said about the CA AK is really true. The AK's version 3 gearbox is also superior to the M4 series version 2 gearbox.
But in the end, get what gun you think looks good, no sense spending a lot of money on a gun if you hate its appearance.