Ok well I think you either need to aim for one thing or the other! The whole point of going to the US is to have good weather and get PPL done quickly. If you want to experience lots of different weather types then stay home. I think trying to do both isn't going to work out too well! Personally I think if your just planning on doing a PPL to fly for pleasure and not to continue to CPL then I would do it at home, as you will learn more about your local weather/area etc. If you just want to learn quickly so u can continue your ATPLs etc then US would probably be better.
Good luck either way!