911 Dispatch Center Chair Recommendations

Hello, I am a 911 telecommunicator in a smaller PSAP. I've been tasked by my supervisor and our Sheriff to look into and recommend chair brands for our center. We need a total of 6 chairs. The chairs will be in use 24/7, as we have two people on 24/7 and 3 on 20/7. We have a budget of approximately 12k. Our current chairs are 24/7 chairs from Concept seating. The biggest complaint we collectively have is that the seats are hard, with some of our older dispatchers needing a butt pad. One feature that is non-negotiable is the ability to lean far back, with it locking at various angles. Please send what you guys use and any recommendations. Thanks!