I have a Toto C744SL bowl (elongated drake).


I was going to order the ST743S tank (g-max)


that Toto recommended, but saw a good price on a ST743ER (e-max)


I tried to reach Toto on Friday, but they were already closed. I'd like to get this thing ordered & done with. Can anyone please tell me whether or not I would be able to use the ST743ER and if I can, which one is better? Or would this not be a good idea.