I want a PhD but I need advice on where to apply based on my background and my research interests, please read!

I am student with a good GPA (we dont formally have GPAs and rankings in my country but it converts to about top 5% of the class at a top 100 university), a masters degree with a great selection of quantum field theory, symmetry/group theory and maths courses, probably some medium-good letters of recommendation (all three are active researchers, one of them is semi-famous, but the letters themselves will probably only rate me in top 10% or top 20%) and a GRE physics score of 750.
I am applying absolutely everywhere, but with the recent revelation that my physics GRE was this low I am looking for alternative grad schools which are still very good in physics but maybe dont have the luster and appeal of Harvard etc.
My research interests: string theory; quantum gravity; mathematics of string theory; geometry and topology in quantum field theory/physics in general. Computations, applications and experiments DONT interest me. Phenomenological modelling doesnt really interest me either, I want pure fundamental research.
Since these areas are quite fashionable there might be more prospective grad students here who also want to know which universities have good research teams for these, so maybe we can share some? I really want to get my PhD and I would be most thankful for any advice!
