Costa is the largest and best known of the European based lines, they're based in Genoa Italy. They are the closest thing available to being mainstream for North American travelers. On an itin like this approx 25-30% of passenger should be American/Canadian. Dubai is very safe for western travelers, many U.S. businesses are relocating there for tax advantages among other things. As long as Tripoli, Libya is not on your itin (it is on many of them) you should be as safe as it's possible to be in that part of the world. If Tripoli is included, tou will not be allowed to disembark with a U.S. or Israeli passport or even a stamp in your passport from Israel.