Couple of quick things on the network side:

Check to make sure the existing network switch doesn't already have an port for a fiber module. Newer switches will have a port for a SFP or mini-GBIC module while older ones use a GBIC module. Both allow the fiber to plug directly into the switch. Fiber modules are usually cheaper than media converters.

If I am reading you right, it looks like you are planning on two fiber pairs with media converters on both ends to connect two devices in the remote office back to the main office switch. You might think about putting a switch in the remote office that is fiber capable. Then you only need to terminate one pair and can add more network devices to the remote office in the future.

Also since the cable is pre-terminated, you may want to consider LC ends over the SC because they are smaller and easier to fit through the conduit. If you are using fiber patch cables on both ends you can do LC to SC patch cables if you need the SC connectors for the equipment.

Finally make sure that you follow the manufacture's bend radius instructions for the fiber. Fiber is way more picky about sharp bends than copper.

Hope that helps!