One thing that many buyers look for in a finished basement is natural light. Natural lighting is important because it makes the basement appear more lived-in and less dreary. To achieve this, you should install windows near either the main floor or the basement stairs. This will allow natural light to stream through the entire basement. You should also consider installing skylights on the upper level of your house.
If you are going to use vinyl windows, you should get some custom-made windows. Custom-made windows will give your finished basement a more uniform appearance and prevent any cold drafts from coming through your doors.