I hate noisy restaurants, and I'm usually quite aware of noise levels.
Within the past year or two, I've eaten at all three of the places you mention - North Pond, MK, and Sepia - and I don't consider any of them particularly noisy. I would add Naha, Intro, Acadia, and NoMI Kitchen for your consideration. All of these are at that same level. If you don't mind spending quite a bit more and (with the exception of Oriole) getting dressed up, consider Everest, Tru, Oriole, Sixteen, and Grace as well.
Another option is to buy an entire seating at 42 Grams. The seating at 42 Grams consists of eight seats at the counter facing the kitchen prep area, and a dining table that seats a maximum of ten. At any given seating, they only serve one, i.e. either the counter or the table, not both at the same time. So you'll have the place to yourself. OTOH because of the procession of courses, the experience there is very food-focused, not necessarily a place for a leisurely conversation among friends. Definitely worthy of mention, because the food is superb, and there aren't many places where you can have the entire place to your group.
Two tips, regardless of where you go. An early seating time (e.g. 5:00/5:30) may mean that the restaurant is fairly empty (and quiet) for at least the first part of your meal. And when you make your reservation, you might request a preference for seating at a table that is usually a quieter area. (Some restaurants may even have a small private room of a perfect size for your group.)