Funkster - no mate I didn't make myself clear about the cost savings. I think you can make significant savings by doing hour building over there which is what I didn't do. The base cost difference between hiring the plane is enormous in its own right. Couple this with no landing fees (in general), very cheap parking (where charged), lots of free information like weather via 1-800 number, cheap accommodation and car hire and the savings just keep growing. You have to pay to get over there which is going to be about 500 quid, and your accomodation won't be cheap unless you manage to rent apartment or stay with friends.
I would recommend that you block book an aircraft which gives you the best rate. Watch out for some real dogs though and avoid paying too much up front. Plan to stay a month or two and aim for about 3.5 flying hours per day average. I think that should be managable. YOu may be expected to fly a minimum number of hours per day if you hire by the hour or a maximum number of days if you buy block time. 3 hours per day is going to be an excellent average.
Savings on your PPL? - well if you're out there to do this and your hour building then your overheads will be reduced somewhat. Careful though because when you pass your PPL tests you can't just start bombing around the air. You need to wait to get the license before you can use it which could take 2-3 weeks.
I give USA the thumbs up because everyone I know who did their CAA licenses/ratings there and then did some flying in UK is a better pilot for it.
When choosing a school/hire company for aircraft ask for opinions on this forum. I'd recommend one of the places I went but they have since gone out of business.