Welcome Rizzo,
A lot has to do with your budget and listening habits. If you could provide a drawing or picture possibly of your room, it may help. You could also consider the m22's or m60's as well, or go for the gusto and get the 80's.
I love my 60's when I owned them, but currently have the 80's due to pressure from other members.
The Qs8's are great, and if you could position them along the side walls, to the side or slightly behind the listening position, that should work great.
The 350v3 sub is also a great sub, if budget allows, you might consider two 350's from the factory outlet, which would be close to the price of one 500. This would give you better overall flatter response across all seats. But, 1 500 would rock S. Australia.
