If you connect the internet link directly onto your ASA you may not have the full flexibility to run routing as you would like to have that might be a drawback here. Also it depends on what kinda routing protocol you are going for, the load sharing, redundancy plans may take back seat if you connect the link on your ASA.
Do post more info about the seup and your plans for load sharing redundancy etc.,
Introduction: The "external-out enable" command is available for
configuration under the "router ospf process" in case of the IOS-XR
operating system. This command basically enables advertisement of
intra-area routes on the device as external routes in th...
Introduction Basic configuration for netflow Scale parameters for
netflow Netflow support Architecture Packet flow for netflow Inside the
LC CPU Netflow Cache size, maintenance and memory Sample usage Cache
Size Aging Permanent cache Characteristics Which...