I don't think you should have to choose between those positives. Why not low, transparent monthly dues and a high commission split? Plus leads?
My friends have had a great experience so far with Mont Sky Real Estate. Primary difference, they give sales leads and referrals consistently to their agents. Their commission splits are pretty generous for your own deals, I believe they start at 75% to you.
Main question you have to ask yourself is do you have an edge over the 50,000 other licensed agents in NYC? Some agents have connections with developers, international buyers or live in a 200 unit co-op building. Unless you have an edge it'll be extremely tough in the business.
That's why the leads matter so much. Good luck!