I think you'll have a great time at any of the better resorts. RIU, Dreams, Iberostar, etc. etc. Some of the "brands" have multiple properties of varying price points adjacent to each other, (RIU does). In those cases, you'll find the amenities are better as the price goes up. (i.e. RIU "Palace" is better than the less expensive "Bambu", etc.) The bottom line is that they're all pretty good though. Dreams Palm Beach is nice, and the water there was VERY calm, (was there last Jan.), but a little more skewed towards guests from U.S. My suggestion is to watch the websites of the various travel agencies, (Apple Vacations, Cheap Caribbean dot com, et.al.), and scoop up the best deal you can get.
Don't know how old your daughter is, or how rough is too rough for the waves; but you have to remember ocean conditions change all the time, even day to day.
Bon Voyage and enjoy the D.R.!!