In our financial data center, we need to switch about 10 incoming data feeds, with total incoming traffic of approx 80 Mbps (between 0 and 20 Mbps per port), and aggregate into a smaller number of links to servers. All ethernet, and we want to use install GigE to give us some headroom. As the traffic is all financial transactions, packet size may be very small (couple of hundred bytes each) and maybe an aggregate 40,000 packets per second.
Our data center hosting vendor (who will support the switches) is pushing heavily for us to use the Cisco 4500 series switches for this, but as the one who will actually be paying for the switch, I can't find any reason why the 3560 isn't more than good enough at well under one-tenth of the price of the 4500 series. The vendor talks about the 3560 being a toy and that mission critical environments need 4500's, but has yet to offer any concrete reasons involving switching capacity, latency or throughput, that would put some meat on thier argument.
We will deploy two switches as part of route diversity, so I don't feel the need for redundant controllers on each switch. However I can see the value of redundant power supplies, which I believe the 3560 supports.
I would appreciate some advice as to whether the 3560 will be sufficient for our needs, or whether we should move up to the 4500 series.