[Highland Park] Recommendations for difficult window replacement

Dear Neighbors, We are going to replace approximately 24 windows in our house this spring. One of them is an "eyebrow" window on the third floor. The casement is rotting, made in the shape of a curve, and divided into three parts. I am seeking recommendations for companies/individuals proficient in replacing these sort of odd windows, along with the other 24 regular windows. Please also feel free to email me with cautionary tales. Thank you, Joan S. Farragut Street