Hi!We have an original oil furnace/hot water system in our 65+ year old house.The hot water runs off the furnace as well as the hot water radiators. Given the crazy oil prices, we are definitely going to switch to a gas hot water tank, but are unsure about the heating system. We cannot switch to forced air because of the age of our house and we are very comfortable with our hot water radiators. So should we go with a gas heater for the current hot water heating system or go for a new efficient oil system? I've heard that oil is far superior at heating hot water than gas and until the recent oil increases,our total hot water and heating costs were ok. Thanks, Fay P.S. We do have a three story addition in the plans for the next year or so that would include a new bathroom and kitchen.