AGM or Lead-Acid?

Since I need to replace my battery should I get another AGM or go with the cheaper Lead-Acid?
Does anyone have a preferred "Brand" that seems to last more than 3 years?
DKamp
I ran a Dry-cell Optima in the trunk for over 20 years. I disconnected it every fall and re-connected in spring. Dribbled a lil gas in the carb , and hit the key; click vroom vroom.
At point of sale it was the most expensive battery I ever purchased. Over time, it became by far, the most economical.
Eventually it failed to take a charge and had to be retired.
That battery absolutely did not care how many volts it did or did not get.