I recently got the ipad and could not decide upon getting from the uk or stateside. After checking online for america the costs did not seem much difference.
I asked in the apple shop in the uk and was told if bought abroad then there would be no issues with warranty, but in best buys where I bought it the saleman reckoned he had had customers in that had bought from america and had problems especially with charging. Twisted my arm and bought the 64GB wifi version, used for 2 weeks in america and just loved it and now back in the uk have changed my Blackberry for a Iphone.
Apple is the way to go (Angry Birds Rocks !!!!!!!!)