Hi everyone! My slider is junky single pane aluminum with dry rot around it, so I am going to bite the bullet and replace the slider with another slider.I live in an apartment in San Francisco, so important to me are: 1. maximizing (north facing) light 2. an external screen - it is a bit buggy where I live and I will have it open a lot 3. durable - it will be under no awning/ it will be exposed and 4. a very secure locking system. The apartment has a very midcentury/70s feel, so I am sticking with a clean, simple line - probably a bronzy-color. My questions: Can you help me understand the benefits of aluminum vs. fiberglass? Right now, I am leaning towards aluminum. and My research turns up dizzlingly divergent opinions on which company to go with, so I would love your longer-term experiences. So far it seems like people are happiest with their Marvin purchases, but they seem so expensive! Is that true in patio doors as well as windows? Is it really worth it? I am a teacher, so I am not trying to break the bank on this one, but I want something that will LAST so it doesn't need to be the least expensive either. THANK YOU!!