Broker is a broker really, they dont actually do much besides put a buyer and seller together.
What you really wanna focus on is the title company, they are the ones who send to ROFR timely, work to get the estoppel, put all the closing docs together and send out timely, get everything in line to close timely, and then close and send everything over to DVD to start the process of them doing their stuff.
Title company to me is way more important than the broker, they dont actually have much hand in it once they connect buyer and seller and hand off to title.
BIG fyi, you can pick your title company!