Your subject title asks for ‘Well Respected Training Schools Abroad’. Apart from a couple of famous schools in Spain and probably one in Greece the rest are obviously going to be in the US. It is my opinion that the vast majority of US training schools are seen as unprofessional and sausage-factory like by most UK based recruiters.
To be honest, in a lot of cases US flight schools are unprofessional and sausage-factory like but I’m not going to say all are. The savings (after conversion, accommodation, and all other expenses) are probably not going to be more than £5k. I am personally spending the extra £5k because the UK is where I wish to fly (so I may as well train here) and I don't want to risk any bias against me (because someone somewhere will). Top $ for you £ right now though, so it's not an easy choice!