As a UK based instructor i see a lot of people who have just passed the FAA PPL in the USA and i find that the standard of training is very variable some are good but a lot of the guys are not happy with using a short (730m !) runway and the navigation skills are poor.
Given your base i would go to australia the cost is much the same as the USA but the overall training standard is very good.
I rented an aircraft from basair at bankstown (sydney)and found them to be good people to deal with (i think the website is basair.co.au)but i,m sure that the "downunder" readers of this forum could recomend a few more places to look at.