Hey there.
Have a look at debenair in titusville, florida. I did all my hour building there and going back in a few weeks to do my IR and CPL. They are a very friendly school, like a real family atmosphere. The costs are very good also. Last year i got a 100hr block C152 for about 48 dollars an hour wet. They are now going to be offering JAR courses as well so that will benefit you. Dont bother with the exams in Ireland, the IAA will just cause hastle for you. visa issue will cost about 200 dollars and there is another fee you will have to pay to the alien flight student program of about 70 - 90 dollars. I presume your just starting training so make sure you have your Class 1 medical first! I'm Irish also but havent done any training in here, its just too damm expensive, go to a JAR approved school in the USA. Much cheaper!! We all have our diff ways of doing it, thats just my opinion. Good luck.
PMG