Given you're in Australia like me, go to a reputable local exhaust shop and get a custom system made up. It will cost you less, you won't have to wait the 4-6 weeks it will take to ship (they ship exhausts by sea from alfisti.net) and you won't have to risk the chance of waiting all that time to find some muppet dented and abused your shiny, expensive, new exhaust whilst it was in freight.
So go to a local exhaust shop (preferably one who specialises in performance systems) and ask them to make you a 2" straight-through stainless system from the cat back. Get a decent sized chambered
silencer in the centre (to reduce drone/boom) and then, since you don't want it too loud, get another small silencer at the rear just to help reduce the decibels a little. They should also be able to give you just about any tip you want so you can customise the look too.
I would think it shouldn't cost you more than about $1000 - $1200 with 2 silencer or about $700 - $750 if you go for only 1 silencer in the centre (which is what I personally would do).
However if you are hell bent on the Ragazzon (they do make good stuff) then pair that rear section with this
central section since you want to keep the noise down.
But personally, get a custom system like I mentioned above. It will be cheaper, is more customisable since any decent exhaust shop will work with you to develop a sound you want, and you don't have to wait an eternity to receive it!