The first 4 schools you listed are excellent places to start looking, you'll get a good flavor of different systems & teaching styles, an idea of average tuition in the area, and a look at Chinese martial arts.
I've seen the sign for the school in Central Square, but I don't know anything about it ... add it to your list of schools to explore anyway.
With no background in martial arts, I think it's great that you're comparison shopping several schools. The basic things to look for are, does the price meet your budget, and are you interested and excited about what you see in the classes? And always remind yourself to look past the "great deals" on tuition (i.e. black belt clubs, multi-year contracts, etc.), and beyond the colored belts, patches, and cool uniforms. Do the students look happy and do they get along with each other? Do you have a good feeling about the place?
When you do choose a school, do not sign up for any contract longer than a year. Here are a few reasons why:
1. You may lose interest in martial arts for some reason, or your job could become more demanding, and you no longer want to/can attend classes.
2. In your first year of training you'll learn a lot about martial arts, your system, and (hopefully) the MA community. You may decide that the art you originally chose is not for you.
3. The MMA guys on this board might woo you into a MMA school, where you will become hypnotized by the tight shorts and sweaty clinches. You'll feel strangely compelled to ditch all other martial arts and set up an altar to the Gracies ...
Anyway, hope this helps. Good luck in your search ...
There is a great streak of violence in every human being. If it is not channeled and understood, it will break out in war or in madness. ~Sam Peckinpah