Not knowing anything about cable needles, I bought a set of the j shaped ones, and frankly, I really like them. They hang nicely on the work, in front or back, and the stitches don't fall off, even if the needle is a smaller gauge than the knitting.
The big plus, perhaps due to my lack of skill, is I can be sure to tell which end to knit from if things get twisted (I always slip them to the needle on one end, and knit them off the other. If you're not inclined to get confused with which end you're working,that may not be an issue. :-D
I'm Knittermom9 on Ravelry