It's only a PPL, i would go to Florida.
Ignore the Nay sayers about Florida training.
The R/T differences is not a pain in the ar**
The airspace differences is not a pain in the ar**
You will most likely learn a few more manouvers in the US than you will in the UK.
As for the weather differences, it really depends when you go. If you go in December you will get all sorts of weather.
Hot days
Cold days (cold enough to have to de-ice your plane)
Cloudy days
Windy days
Rainy days
I perosnally went to OBA. When I got back to the UK I done 1.9 hours with my local club and that inculded a cheackout for the C172