My answer would be: "That depends..."
If you're looking for a new position, or to go to a new company, more of the recruiters, etc, will recognize CEH (while not as much as say, CISSP,) more than they will OSCP. The two certifications / courses also go in some different directions. I currently have CEH, and am in process on OSCP. CEH class went over a lot more of the 'principles and standards' than OSCP does, so sometimes, it's good to have that info, however, for the purely technical side of things (actual scanning, exploits, etc,) OSCP seems to be much better.
So it depends on your reasoning. If you truly want to be well-rounded, then it wouldn't hurt to get CEH, for the theory and such, or if you're looking to move to a position that requires it (or at a minimum is familiar with and respects it.) If you are solely into the thrill of the tech and knowhow, then maybe you won't want to get CEH at all, and you might decide to spend that extra money on another technical certification course, like the new one from eLearnSecurity, that Jason Haddix reviewed on here, recently, and I'm also previewing, for the authors.
It can be a very fuzzy call, on your part, just depending on your goals for it all.
~ hayabusa ~
"All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved." - Sun Tzu, 'The Art of War'
OSCE, OSCP , GPEN, C|EH