Britney Spears got married there I believe, however her marriage didn't last too long so maybe thats not a good example!!! Why not get married in Ireland, it would be much easier for us lot to attend, oh me thinks I know where you are coming from, ha ha.
Good luck mnko wherever you decide, and if you do go for the US just remember to bring the correct documentation (birth certificates) as my sister was due to get married in San Diego but her husband-to-be didn't bring his certificate with so it had to be postponed.
warpig1