Opinions. Opinions. Good job we all have them.
I had a gti mk6 dsg on a 10 plate. I loved that car and thought it could'nt be prettier. Unfortunately i had to reject it cos of a faulty box.
I now have an S3 sportback in white S tronic box.
I agree it not as pretty as the mk6 which was also white but the auto box is far far superior than the dsg and has far better build quality all round.
As i waited 7 months far my mk6 to arrive i spent hours on this forum reading about all the faults and niggles found by owners of the mk6 so there was no way i could take the risk of ordering another golf whether a gti or an R.
So to sum up i think the S3 is better looking than the R but not the gti and the audi box and fit and finish in general is better than the golfs.
PS: the S3 is faster than the R.Yes it is.
erm no. the s3 and R have virtually the same auto box. If anything the R has a newer version.. "improved" is what they call it.
..and no the S3 is not faster than the R 
I can assure you there is nothing but driver skill in it between a golf R and an S3. I have had 2 have a go and I slightly edged it but they were newer engines which is the only reason i was slightly quicker.
Looks are subjective, i think the mk6 looks like a mini tourag which is a very ugly car. The Audi's interior is far superior to the mk6 though which was made with cost cutting in mind, something the audi isn't.
Also the fact it's going to be replaced means nothing, once the new A3 is out the MK7 will be out so the Golf R will be replaced just as quickly.
Get the ine you like. In the golf people will think you couldn't afford the Audi, in the Audi people will think you are a cock. Depends if you are bothered what people think, S3>ED30 though every day! Golf R>ED30 also.