Qantas Frequent Flyer - QF9 in U

Any thoughts on seats J and K row 25 in U?

It's along walk to the dunnies, the PE bassinet is just behind the curtain and you'll be among the last off.
Rows 11, 12 & 13 are generally preferred.

How soon is the flight?

By some time next year, rows 24 & 25 won't exist for U class on Qantas A380's.