We have mostly GBIC trunks between our switches and router, I really don't see any value added on a SFP over a GBIC. I am not saying SFP isn't any good, I am just saying we really don't see it in our application. We have one 3560 with SFP and don't have much activety on the thing..
At any rate, the router we are going to connect to has SFP, but we could actually just buy a fiber pair that has GBIC for our side and an LC Connector on the other end of it to connect to the other route..
I would say the only advantage of the sfp over normal gbic is their size and as long as you have the same type of light (sx,lx,zx) you can hook them together with a suitable patch cord.
Unless you have to have fiber I would run your router on the 100m copper interfaces. None of the routers you are looking at come anywhere close to 100m of thoughput and do even worse when you run NAT on them.
I'm working on a project that includes basic router configurations. I configurated everything including: line console 0, line vty 0 15 and secret passwords. There are 3 routers in the network and every LAN is going t...