Hands down best in tank heater is the Aqueon pro imho. Followed by the eheim jager
I keep 2 250w aqueon pros in my 125. They maintain 80F tank temp in a room that is 10-15deg colder than that no sweat. Also they've held up to the abuse from a jaguar & dovii cichlid if that tells you anything. I've used hydor, marineland, fluval, via aqua, & aqua top