difficult choice

Dear JMs,
I've been visiting this forum almost everyday. I feel here is a
very friendly community for each other to discuss problems in our lives.
There is something going on in my life, and I would like to seek for
some suggestions, if possible.

There are two male friends of mine, who have been friends and close to me.
A is working full-time in IT field, just starting his career, never married. We knew each other through the university for 3 years. He has heart related family disease, I am not sure whether it's serious, but he had been sick before. But he is a trustworthy and reliable guy. B is still studying at the university, he worked part-time at where I work, we know each other for 1 year.He is divorced, and his child is 4 years old,living with the ex-wife.

I am considering to start dating and have a family in the next 2 or 3 years if possible. Both A and B have showed me their interests, and I've gone out with both of them. A doesn't talk much, doesn't express his feelings that directly, but give me a safe feeling, we talk mostly about work. B and I have lots of interests in common, and we talked a lot about music, polities, sports, and so on. The communication is much better than what I have with A.He is also honest, and good at express his feelings. I can say we have a lot more chemistry inbetween. But I just don't know whether it's complicated to date a divorced man, also he's not into the job market yet, can't afford as much time and money into the relationship. Sometimes I even have to cover his part when we go out. Although I know this is temporary problem, he still has 2 years to finish school.

I would like to ask JMs, what do you think is most important for a family to work out? What kinds of personality did you seek for a hu*****and? I just feel confused and don't know which one I should choose to be a boyfriend.

Thanks very very much!