Want to configure primary and secondary routes for up/down stream traffic

I have two Internet connections one of which has a greater downlink speed and the other has a greater uplink speed. They use different IP address blocks and I want to use the greater downlink connection as the DEFAULT outbound route. If the default route is not available I want to use the other connection. Also I want to use the faster uplink connection to receive data.

Details:

I have a Cisco 2600 series with 3 interfaces and Cisco 3500 series switch. The preferred uplink connection connects directly to the Internet and I would use these IP addresses on my external VLAN. I also have an internal VLAN which I would like to connect the faster downlink connection to. The internal VLAN connection is front ended with a Linksys router and uses non-routable IP addresses i.e.

I want to setup the router with real IP addresses for all three interfaces i.e. Internet recognized and I want to connect the internal

The servers would have real Internet and 192 addresses multi-homes to the internal and external VLANs on the switch.

QUESTION(S):

Can I set a default route on the router for the directly connected to the Internet and a deffault route on the switch for the 192 connected network?

Would this type of conneciton fail over to the direct Internet connection if the 192 connection was unavailable?

Note: We would use Internet DNS entries to force incoming connections to the direct Internet connection AND HOPE THAT THE SWITCHES DEFAULT ROUTE WOULD CONTROL THE DOWNSTREAM.

Will this work?