A guy that I work with used Windows and Doors, Replacement Windows, Custom Doors - Air-Tite Home Products, I think he paid around $6-$7,000 for his. There nice windows and they did quality work but that seems like to much money. For size reference he lives on Glendale around the corner from Vince.
That does seem kinda high, I'm looking at around $3000 for 11 windows.