OK, this one is about speeds for load balancers.  Or firewalls for that matter. Don’t get completely caught up in the maximum throughput and concurrent session numbers.  Remember to fully investigate the connections per second (CPS) or new flows data under a variety of enabled features.  Sure a box can pass 900Mbits/sec when it is 20 high-speed flows and there are minimal rules enabled.  But how many new connections can it process and build state tables for under your configuration requirements.  The file size requested in those new connections will also have a drastic effect. You might find products handing only 4000 up to 400,000.