I was thinking of getting my parents (who currently live outside the US) an iMac as a gift, but obviously, don't want to check it. Apple products in the country they are at run at 3-4X the price, so it would make much more sense to buy it here and take it to them when I go visit. Question is.. has anyone ever taken an iMac on a plane before? Should I unbox it or will I be allowed to take it in the box? Thanks!