I agree with the other posters...don't bother with expensive deep cycle batteries...they die in 2-3 years as well.   I'm done with Optima's etc.

Buy the 3 year Wally World Maxx battery, when it dies (it will most likely die before the 3 years), get a free one, anywhere in US/Canada/Mexico no hassle, no questions asked.  The replacement has a newer date code, so now you get 3 more years.

Repeat forever if your conscience allows.