I see professional streamers have a switch setup and don't exactly know if they use a normal gaming router or like a server grade switch and router setup for streaming to twitch and having great gaming ping's. If anyone knows what they are doing please let me know.
Why would you think you need any special router or switch. Even fairly inexpensive consumer equipment is faster than most internet connections. The major difference in routers is related to wifi and you would never use wifi where you need good consistent performance.
The key factor is getting a internet connection that has enough upload rate.