Glass tint depends on the cars original domicile. Some countries had clear glass, and some had tinted. All U.S. delivered 280SL cars had tinted glass and a filter band (the bluish brow atop the glass). The tinted glass is also called heat absorbing glass. The actual color is green, or shot colored. There was no blue tinted glass. The easiest way to see what your car had when new is to either look at your data card to see if it has the option code for heat absorbing glass all around, or if that's not present then hold a piece of white paper on the back side of the glass leaving half of the piece of paper exposed. You'll then see if the glass is green tinted or not.
On the other hand, some people prefer one or the other regardless of what the car originally had. The clear glass makes for a beautiful, clear, unobstructed view looking out and looking in, but a lot more of the suns heat will come in and cook your dash, and can make for a somewhat hot drive.
Years ago I restored a 300sel 6.3 to gift my Father for his birthday one year. At the time W108/W109 windshields were still available from Mercedes, and I decided that I wanted to put a clear glass in. Yes, it looked spectacular! But man what a mistake. The black dash on a hot summer day is brutal. In another W109 I have of my own it still has the green tinted heat absorbing glass. It also has a black dash. The difference is night and day. I'll never put another clear glass in unless I need to for originality purposes. Even then I might consider finding a set of green tinted glass just to save my interior and keep the insides a little cooler. I suppose the choice comes down to vanity, practicality, and what is best for the car and the driver/passenger.
Both clear and green tinted windshields are still available for the Pagoda, so you have both to choose from. You don't have to buy from the Classic center. Everything they can get any dealership can get, and often times a dealership will offer a better price than Classic. You'll just have to shop around. And yes, buy Mercedes rubber seals, and don't forget the sealant that goes between the seal and the body, and the seal and the glass.
And which chrome pieces are you looking for? Some are still available new ($$$$), but most others you'll have to have re-plated.