People who demand high performance inverter/microwave performance should seriously consider high CCA AGM batteries which in that mode will kick the snot out of any flooded battery of equal size and weight.
The problem is that most RV'ers learn via the school of hard-knocks. They design, they build and come up short.
But if a boondocking microwave is in the future for you, and battery space is limited. Forget flooded anything. 2 group 31 AGM batteries will markedly outperform 4 Trojan T-125's. The word MARKEDLY is not used loosely here.
Forgot to add: The AGM will blow a flooded 31 in the weeds as well.
The posts immediately above are great by the way. I thought I'd amplify and elaborate.