If you're curious about custom cables, I say choose your favorite vendor and buy one, and return if you don't like the results -- avoid anyone w/ a restocking fee and you'll only be out ~20 for the cost of shipping to and back, and you'll never have to agonize over whether it would have made your setup better or not. Personally I've had the chance to try some of ALO's custom cables at meets, and felt it made no difference -- don't forget that the stock cables are made of fairly solid components themselves.
As far as ergonomics, after sliding off the red/black sheath up top and cutting off the plastic meshing I find them very comfortable. Sliding off the tubing makes the jack not protrude as much, taking the meshing off makes the exposed cable gets rid of the annoying grating cable effect any time you move.