Seth,
If you wanna do El Camino del Diablo, you should do it. IMO, it's definitely worth doing...ONCE! BUT...if you haven't done the Mojave Trail, I would recommend it over del Diablo. I'm just throwing in my two cents worth as someone who has done both. It will be interesting to hear opinions here from others who have also done both.(Scott, Al, Chris, who else?) From my point of view, the topography on Mojave Trail is much more varied, interesting, and beautiful than del Diablo.
Happy Trails....Vince
P.S. No way am I trying to discourage you from doing del Diablo...just throwing out my frame of reference...something I appreciate from others!!