I am an EMT-B and have been for several years. I have also taken the nurses aid course, it was required for the nursing program I am attending.
The EMT-B course taught me more anatomy and physiology behind things. It also taught me emergency treatment, remember the A,B,C's, stop bleeding, vital signs, transport and some documentation.
The nurses aid course taught me more daily care of a patient. Transfers, bathing, range of motion, activities of daily living, restraints, laws pertaining to the health field.
They are two separate fields. EMt more complaint focused, stabilize and transfer. Nurses aid more person focused, comfort, health, long term care.
I would lean towards the Nurse aid course myself and if you have a chance to actually work as an aid it would help immensely.
As for the phlebotomy, I have considered this myself. I was advised by my teacher and some other students not to take this class before I do my RN level and iv starting. They say you hold the needle differently in your hand when starting IV's than when you draw blood, and if you learn blood draws first it is hard to retrain yourself. Quite a few places have other people do blood draws anymore,CP1's and phlebotomists. RN's are the IV starters, so I figure I will take their advise and learn the IV techniques first.
Good luck with whatever you choose,
debblynn (LPN grad in one week.....Yeaaaaaaaahhhhh)