Hey guys, i need help in deciding my future

i decided to go back to school, i took 3 classes earlier this year, but im gonna go back now full time and finish.
my major is:
- Computer Network Technology
what i will have at the end is:
- Associate of Applied Science in Computer Network Technology
- A+ Certification
and 1 more thing, but i have to choose. here are the options:
- Microsoft System Engineer Windows 2000 (MSCE)
- Cisco Network Administrator (CCNA)
- Cisco Certified Network Professional (CCNP)
- UNIX Network Administration
i dont know which one of those is best. whats the difference between CCNA and CCNP? would the UNIX track be better, since i can see it being useful as well?
thanks guys