Help choosing a lens for my Nikon DSLR?

I currently own a Nikon D90 (DX) and a Nikon F100 (FX). The D90 came with an AF-S DX NIKKOR 18-105mm f/3.5-5.6G ED VR. I also have an AF-S VR Zoom-Nikkor 70-300mm f/4.5-5.6G IF-ED. I just bought the F100 and I need a lens for it. I have noticed my growing need for a fast lens in low light situations, and have also grown fond of bokeh.
I need a lens that will work in low light, and that will work for both my Nikon D90 and F100 (meaning it needs to be an FX lens). I have researched a lot and have found these two lenses one is a DX lens and the other one an FX lens. I don't know if it would be wise to buy two lenses that are so similar, one will work only for the D90, and will work as a 50mm due to the crop sensor (http://www.nikonusa.com/en/Nikon-Products/Product/Camera-Lenses/2183/AF-S-DX-NIKKOR-35mm-f%252F1.8G.html) and the other one will work for both (http://www.nikonusa.com/en/Nikon-Products/Product/Camera-Lenses/2199/AF-S-NIKKOR-50mm-f%252F1.8G.html). The problem is that if I buy the FX 50mm (second link) I fear it will be too long when used indoor. I want it mostly for shooting street photography, but I know I'm going to use it for indoor photography eventually. My concern is I might not be able to fit the entire scene indoors.
I have researched this lens (http://www.nikonusa.com/en/Nikon-Products/Product/Camera-Lenses/1923/AF-NIKKOR-35mm-f%252F2D.html#tab-ProductDetail-ProductTabs-RatingsReviews) which seems to be ideal and it isn't that good. This one is ideal but is very expensive (http://www.nikonusa.com/en/Nikon-Products/Product/Camera-Lenses/1923/AF-NIKKOR-35mm-f%252F2D.html#tab-ProductDetail-ProductTabs-RatingsReviews). This is another choice but it is a manual focus and to be honest if I'm going to spend $1000 on a lens it better have auto and manual focus. Another lens that I researched (http://www.nikonusa.com/en/Nikon-Products/Product/Camera-Lenses/1435/NIKKOR-50mm-f%252F1.2.html#tab-ProductDetail-ProductTabs-RatingsReviews) is this one, but it cost $700 and is manual focus. I'm open to any other brands that aren't Nikkor as long as the lens is sharp and has nice bokeh.
Any suggestions?

35mm or the 50mm are the best and cheapest for low lit situations. I have the 50mm because I couldn't afford the 35mm and it is awesome! I never take it off my camera. 35mm would be an upgrade to the 50mm but both are great.