I think you should apply to some British universities, they'll probably value your MA from a "not-well known" British university more highly than places abroad as they'll have a better understanding of what it involves. Depending on how rigorous it was, you may be able to go straight to PhD status so you'd only have one more year of coursework at most places and could finish in 3-4 years rather than 5-6 in North America which I guess would be good for you given your age. As you appear to have been living in the UK for a couple of years, depending on your residency status you may be
eligible (p.18) for ESRC funding which is the best form of funding at most UK universities otherwise mos universiites have some funding for international students which you often have to apply for seperately. As well as the usual suspects you may wish to consider places like Nottingham, Bristol and Essex (I can't remember whether their strengths match your interests though).
ADDENDUM: Also, you won't have to report your GRE scores in the UK, which, although they're not terrible, you probably don't want to do voluntarily as the 770 might not be high enough to make the 720 look like a one-off.