I have 2 doors opening out onto my patio from a new open plan kitchen dining space being built as an extension. One is a 1700 wide opening and the other a 2100 opening. The larger opening will also be my front door. I want them in grey aluminium, but don't know whether to have sliding, bifold, French, or another type of door for these openings. I need as much light as possible as they are the only light coming into this room, and would prefer my front door to not be a slider.