RE: Any HVAC guys on here?
What you would need is a boiler, an indirect hot water heater, hydro air handler (have the refer coil in them) and the condenser. Depending on how your house is set up you could break the house into zones with a couple air handlers. This could also be set up with baseboard if you needed for an addition (much easier to run pipes than vent ducts). This system would also take care of you hot water (electric is mighty pricey to operate).