Hi and wow we have similar situations...i have a bs in psych and am currently about to finish my diploma nursing program and start as a new grad in the nicu.
before i went back for the rn, i researched the schools in my area (diploma, adn and bsn) and i chose the school with the highest nclex pass rate which happened to be the local diploma school. i also liked the idea of a focus on clinical. because i possess a bs - even though it's not a bsn - i will be able to do a rn to msn bridge with a few extra classes to earn my bsn on the way. maybe consider your ultimate goals when planning this step of the process.
each person's situation is different - there are so many options. i'd recommend researching the options available to you and choosing the one that seems to be the best fit for your time, personality and goals.
goodluck!