@Craig Moore @Steve Bracero
I am also in the same boat. I am studying for the PA real estate licence.
In response to your question, you have to figure out what your goals are.
If you want to sell homes, standard single family homes, and make a career out of it, you can easily join any of the national chains. (Berkshire, etc)
If you want to sell larger multifamily, you will likely have to join a specialty firm that handles that. The good firms are very difficult to get into (requires experience, a certain look, etc) but they will make you super rich in a small amount of time - of course you have to be a salesperson and know what you are talking about. But these firms get direct lines to the richest sellers/buyers and close dozens of HUGE deals a year. (Typical salesperson can easily do $200MM+ in sales per year.)
In my case, the real reason I am getting my real estate licence is to represent myself in my investment purchases and earn 3% back in each transaction. For this reason, I am going to target a small local broker who is willing to hire me part time for this purpose.
In summary, find out what you would like and go for it.