Would the advance purchase restrictions not kybosh both the ACIR22 and Explorer ticket restrictions? OP wants to travel "this week" and both those tickets have 7 day advance restrictions on them.
Ben, the suggestions will definitely save you serious dollars and the ACIR22 is a snip (US$7100) if you have the time to go QF one way and CX the other. You just need to plan ahead a little more.