Why not visit them all?

The QF lounge is great, but then again most lounges in HKG are. To be honest, closeness is not really a major issue as the QF and the WING are close to each other, the cabin and bridge are reasonably short walks away.

Last time I was in HKG, all the QF flights were departing from the mid 20's gates which is closest to the Cabin.

Any lounge is a good choice, my preference is for The Bridge.