Blackpacker,
I have looked into flying in the States. However, alot of UK flying schools advise not to as the students then require alot more training to get to CPL standard.
Also the airspace is very different compaired to UK airspace. I would have loved to do it in the States but, unfortunately the cons out weight the pros.
Hour building is a possiblity, unless its a long application / visa process and confusing FAA checkrides
We shall see cross that bridge as and when we get to it.
G-XO