$200 plus parts is VERY reasonable in my opinion. Keep in mind that the cost of the parts adds up quickly...especially if you include new ball valves, circulator, etc etc...don't forget about your expansion tank; that Extrol 30 won't be happy about the extra water volume in the EFM.
Who is in charge of getting the EFM in the basement and assembled?
Why do you want to run multiple zones off the coal boiler? I would run all the zones of your oil boiler, and heat the oil unit with the coal boiler.