Well, that is something I really don't know... Like I said before, I'm just a student trying to get into the networking field, and since I don't have experience, I figured certs would be nice, at least to get me a job and I can work from there. But it reall depends on what you want to do.... If you were to go for the CCDP, then you would be more qualified in consultant type jobs. The CCNP is in the implementation side and they seem to get more network administration. Really they both could be high paying jobs. My recommendation is to go for the CCNP, then to work on the CCDP. Whenever I went to take my CCNA test there was a CCIE written candidate and he said he studied for both the CCNP and CCDP at the same time, even took them the same day. So, it is possible to get them both fairly close together, there isn't any rule saying you can't study for more than one cert at a time. In terms of job oppurtunites, that is really a location issue. You just have to take a look and see what jobs are in your area, and what they would want you to have. Expecially now, with the down-turn in the economy, if you are looking to getting into the networking field, you aren't going to find the fabled $60,000/year job. Chances are that you will have to start at the low end and work your way up. The certs don't get you the job, they just give you a second glance by the business. It's up to you to earn the job you want....
Hope this helps....
Burke