What is the best way or appliance to limit bandwidth usage for most all of the clients (30) but allow 8 or 10 machines unfettered access to all of the available bandwidth. In the network that I am managing, several of the clients will start downloading/uploading and cause some of the mission-critical machines to slow down their tasks on the internet. I am running a SonicWall TZ-180 but would upgrade this firewall to find an easy to implement solution. The only requirement would be an appliance would need to do a good job of content filtering. Thank you for any help.