I have gas heat and city water clean. My home has a lavette, a full bath, and a master bath with a soaking tub 75 gal, and a shower ect the ??? is a tankless going to work for me , would a amtrol boiler mate be better or do I go with tradition and get a gas fired heater .. what do you plumbers and heating men and women have to say. the guy at home depot says the aqua star tankless is the way to go at $475 the guy at the heating supplier says go with the phase 3 by triangle tubing == a product that works off the gas boiler my friend say go with a amtrol boiler mate or someting please help!!! thanks and god bless.