Well, much of it depends on your location. Are you planning on moving at any time? Does your state require NREMT for certification (example: California uses the NREMT-B exam as the state exam now)?
i live in nj. i think we are a little behind in the ems sector. my neighboring state is pa and accepts my nj cert. just lookin to improve my certs. looking to get my emt -i...just cant seem to find any classes, so i thought the nremt would be my next choice