Schools that typically do well in NEPSAC every year - Westminster, Loomis, Choate, Thayer, Miss Porters, BB&N, Worcester. If your daughter wants to play in college, consider access to ECNL programs in the area. For example, most Loomis girls play for CFC or FC Stars, Choate girls play for CFC.
I recommend reading this: How Athletes Can Build Advocacy for Admission to Prep School