For that kind of money, I'd wonder if you could get a share of a private jet instead, and whether that might be just as good a deal.

(Or, for yet another option, a new Pilatus PC-12, which is not actually a jet, but which is quite capable of taking you and several friends to Europe, only costs $4 million. I think you can pick them up used for like $2.5m. Of course, that doesn't include maintainence costs, hiring a pilot, insurance, hanger space, etc.)