To be perfectly frank, if your post-PPL flying is going to be done in UK/EU airspace then learn over here. Otherwise you will soon find it is a false economy to go do a cheap course in Florida, because you're going to come back to Europe and be utterly confused by the way things are done over here and how complex and busy our compact airspace is. So you'll be spending extra un-necessary time and money playing catch-up.
Do a search on the forums if you want more detail. This topic has been done to death. It is also partially the reason for the topic just underneath yours at present, entitled "England sucks", started by someone who went the cheap route in Florida and then was in for a surprise on his return ! There are some pointers on that thread to a few airfields in the UK where flying can be done relatively cheaply.
That's my opinion, others may of course see the US through rose-tinted glasses and not understand what I'm on about !