If you like plenty of daylight and you have a large room backing onto your garden and you also are thinking about building a conservatory against the room, one option would be bi fold doors.
With a bifold door you can open up most of the width of your room rather than using the more traditional French doors to lead out to your garden / conservatory. This will give a huge sense of space, and our aluminium bi fold doors are ideal for the purpose. They can slide one way, both ways and fold in or out, and as you would expect, they are very secure!
Something to think about...