My CCNA is due to expire later this year. I'm considering my options of recerting. It seems kind of like a no brainer to take the 642-901. Since I have to take an exam why not take a step towards my CCNP? However, in my current job role I don't use this knowledge regularly. I'm not sure if pursuing a CCNP would be worth the effort at this point. Simply retaking the CCNA exam may be more efficient use of my time. Lastly, I've considered one of the other CCNA exams(wireless, voice, etc).