Most recognised flying school abroad

[PA-28 CLOUD SURFER]

I am a university student and have a dream to fly commercially. On completion of my degree i am going to apply for sponsorship and if unsuccessful head abroad to train. I hear that it is a good idea to do the groundschool in the UK but for reducing costs and for the best training is it better to go to the US, Australia, New Zealand or Canada? Any suggestions welcome.

Thanks