thousands. comes down to what color do you want, do you want fancy or plain, do you want full size or mid, do you want usb 3.0, do you want removable bays, do you need a long case for a huge video card. saying you want a case with a window doesn't answer any of those questions.
Go look on newegg or pcparkpicker at case. pcpartpicker lets you pick window, color, usb3.0, etc so you can narrow it down.