Thanks for the info guys. Suzie Q - that is the exact fridge I've been coveting. Do you find it reliable?
A little more on our situation. I wouldn't really use the ice - however my children would use it morning, noon and night and never, ever refill ice cube trays. I, on the other hand, would use the filtered water all the time. I don't care for the taste of our tap water and so buy bottled water regularly so that will be a saving. Plumbing shouldn't be a problem. We have a friendly neighborhood plumber who plumbed in our dishwasher (directly next to the fridge) for not much money.
You've all given me a lot to think about - I still am leaning towards going with one but I know far better what to research re filter costs etc. Thanks!