Currently I am looking for a standby generator for my home. I know the difference between an 803 and 804 is a 10 K vs 15 K. But I’ve heard there are some different versions of the 15 K such as an 804A or an 804B. Is there a difference in reliability between 803 and 804? And also I’ve heard some people say stay away from the 804B. Is there any concerns or reliability issues to worry about if I was looking at an 804A compared to an 804B. Does anybody have any opinion or feedback ? Thank you