Go to a local distributor and avoid the big boxes. You'll get better service and probably a better price. I have done this for a washer, dryer, and stove and have no regrets. The folks in a Home Depot are nice, but they do not have the knowledge you need as they have far too many lines to know much about any of them.
I agree with this. We got a 4 piece KA set and had great recos and service from a local dealer.
The one thing I would do differently is get the dishwasher with the controls not showing. My wife didn't want a handle sticking out and now when we are cutting stuff in the kitchen, we bump into the D/W and t turns on.
BTW, KA stainless fridges take magnets. We have a ton of kid crap on it. And the smudges aren't bad at all.