I love those Acacia floors!! I've never seen them, but oooooh they are gorgeous.
I have oak. It does NOT stand up to the dogs' nails. Or the kids. It's a fact we accept, as we just put the same floors in an addition we've recently renovated. We will refinish it once the kids are older, and if we stay another 20 years after that, probably one last time before we sell.
Your home's location and other homes in the area will determine how much laminate could devalue your home. If you're in a neighborhood where hardwoods are standard, laminate may devalue your home. I can say that I've never heard of laminate ADDING value to any home, but, if you add hardwoods in an area that doesn't support that kind of an upgrade, then you'll be overimproving and risking money loss.
I wonder if these salesmen are getting more of a commission or upcharge on laminates vs hardwoods? I don't know about concrete slab and flooring options, but I would be tempted to call and get the truth from someone who doesn't stand to make a buck off of the advice they give. I don't know who that might be. Maybe a local builder or contractor or home inspector?