So far I have ok luck with the Optima Yellow tops, have one in my 79 and one in my GN, they are about 3 years old now, had one in my boat for about 7 years...BUT...now that I have discovered Odyssey were the ones that made the Die Hard AGM batteries that are now disco'd, I have switched to them so far in both my boats..Made in the USA in PA..rather expensive but I have 3 DieHard AGMs that are 5 and 6 years old and are constantly drained. Between cars and boats I have 12 batteries to maintain, 1 boat has 4 the other has 2..mostly for stereo.
Oh and I had the same issue with Red Tops, the early 2000s one lasted 7-8 years, then the ones I bought in late 2000 had to constantly be replaced under warranty. I just put down a Die Hard liquid battery that was 13 years old.