Very hard with kids' school schedule so it might be 15+ years out when we're "old". Maybe it'll be a "the kids are out of the house; it's time to partayyy!" present to ourselves.
That's the situation we're in, also. But in less than 6 years the youngest will be in college in our house.... Let the cheaper travel begin. I'm eyeing up a repositioning cruise from the west coast to Australia... Nice way to get there with no jet lag or deep vein thrombosis.