Ahhh decisions decisions
I would get all my questions answered by the new landlord and if you decide not to move, I would put everything in writing to the landlord and send him the letter "return receipt" in the mail about what he promised to fix etc. Keep a copy of the letter for yourself. Most states/cities/towns have a landlord/tenant office that you can write a complaint to if the landlord does not fix problems in a timely fashion. You cannot hold back rent unless you have served him with a letter stating that the safety issues with the apartment need to be fixed. There may also be a law that states he has a certain length of time to fix them in too...you would have to find that out by looking up the laws in your area. It can get a bit dicey....
I think, with your list of pros and cons, I would move. You can always talk to the other tenants in the new place to ask how the landlord responds to fixing the issue that come up and how often he raises rent etc etc. Doesn't hurt to ask many questions
Good Luck Angie!

sabby