My advice (remember free advice is sometimes worth what you pay for it
) has been coming at this from the point of view of best value, not the cheapest.
I'm just saying that a 32-quart pot will suffice; I brewed with one my first 24 batches, and I easily controlled any propensity to boil over. I only had one even get anything over the rim of the kettle, and that wasn't much, and it was before I learned about spray bottles.
The boil you want isn't a huge rolling boil, it's closer to a simmer. You want some roiling, but not a ton. But you also want to heat the water and the wort in a reasonably quick fashion. The KAB4 is better for that. I wish it had longer legs, but maybe you can make a stand for it out of 2x4s or something.
It sounds like a money tradeoff here. I'm thinking to myself, what are you going to wish you had done 4 months from now? A bigger kettle that takes much longer to heat, or a smaller kettle that will still work well but heats up much faster?
My choice would be the KAB4.
In the end, we all have different values, different needs and wants, and you need to choose what makes you happy, not what would make me happy. I don't get upset if someone doesn't do what I suggest. All you can do is gather information and make as informed a choice as you can--which is what you're doing.
Good luck!