For what it's worth, when I was looking at schools, my research indicated that Wizzard helicopters in Wales were one of the cheaper schools around; of no use whatsoever to me, since I live a fair old way from Wales, but there you have it. I also have no idea what they're like, either.
There's always HAI in Florida, who do JAR licenses. But then, you wouldn't have much experience actually flying in UK conditions, and apparently the ATC in the USA is considerably less strict than here, due to there being much more space to go around (I'm open to correction here, as this is not based on personal experience).
A quick google should give you the relevant web addresses.