It is about double the Virgin price so I find it hard to see how it would be worth that much more. Seats, entertainment and food/drink all seem pretty similar.
I trying Virgin's in Feb/March and can let you know if it isn't too late. This is because of what I said above and I am a Qantas gold FF.
What I can tell you is that Qantas Business Class is no better than many airlines and, in my opinion, is behind several others such as Cathay, Emirates and Singapore despite the price premium they charge.