I think you have a very solid application. There's nothing that jumps out as could hold you back. As long as you have great letters of rec and a strong SOP, your list looks fine. As I say to everyone, though, make sure you're actually interested in at least 3 faculty at each school.
As far as school suggestions, I think Brandeis has great people doing membrane trafficking stuff.
I think your special bonus points and any other info comments could both be looked at as very interesting by admissions committees. If cancer is relevant to why you want to go into research, you should mention that in your SOP.