If it was me I'd go for the Boeing, as there's something about that big graceful bird that still captivates me. And by all accounts it's a nice, steady ship to handle too. But in the real world, a Bus rating means you can easily slide into the seat of an A318/19/20/21/30/80 if needs be, as opposed to having a 744 rating which gets you into an, er, 744....