I thought cheapest implied coach! If I want to do F or J cheaply I would use one of my RTW trips to get the bonus (and maybe multiple ones following quebec's example). This is to see what the minimum cost I can get out of this for to secure as many of the bonuses as possible. Ultimately I will have the bonus on with AA on my next RTW trip and maybe be able to get one in on either CX or QF. But now that there are five on offer....