FYI and I don't know if it prevails, but we didn't buy a set for ours. We use a lot of cast iron and that took care of a big part of our needs. We did buy one sauce pan after finding several other pots that were usable. The one common denominator among these pots were that they were all hirer end units. None of are cheaper mid level units in terms of cost qualified.
In my opinion despite some of the nice features of the cooktops, I wouldn't get into one if I had to buy all new utensils. They don't have that many advantages.