Cisco WAN :: Connect 7206 And 3900 Series Routers Through Fiber?

We are migrating from a Microwave T1 WAN to a Fiber ring WAN which I'll be connecting to our providers Ciena Metro E switches.  Eventually we are going to move away from the routers,  but the network is a little too complex as well as spanned across a lot of miles.  Since I am the only networking personnel here, I would like to first simply migrate to the fiber by simply moving the connection configs off of the T1 interfaces, and onto one of the Gig interfaces on the 7206 and on one of the Fe interfaces on the 3900 (which is actually a 3700 series because the line card on the 3900 is toast).  If this works, I will need to purchase Fe line cards for the 7206, because I found out that the virtual interfaces do not support Policy Mapping for our QOS and Multicasting.