I'm considering a switch purchase and every reference I've seen refers to the Catalyst 1900. All of these on Ebay seem to have 10 meg throughput on most if not all ports. Isn't 100 meg the defacto standard these days? Is there a particular flavor of 1900 that supports 10 and 100? Are there particular designations that should be selected prior to purchase? Are there any other caveats that should be considered prior to purchasing a switch?