have bought 2 cars from audi centre sydney, the hq. an rs4 and an a3. look at the new a45 as well, it has all the updates. the rs3 is a ball tearer, for sure.
my brother has a 2014 b8 rs4. he owned a b5 rs4 for a number of years, i owned a mk6 gti.
this is my take, vw make good value for money cars, nicely designed, and well equipped. but i cant get over the reliability issues. i suffered a few, in fact more than i care to remember. dont get me wrong, i would love to drive a golf r for a day or a week, but i would never own one again.
my brother, who has owned 2 rs4's, wont buy another audi again. he is going back to a toyota hilux. maybe his expectations for a $170k car are too high, but engine replacements, and breakdowns wasnt something he expected to deal with. he says its an awesome car to drive, but the ownership experience isnt.
the rs3 is a great car, and from all reports, it wins everything out there. good luck whichever way decide to go