Hello Paulz and welcome.
You may get a better response from posting in the A3 8P section, where you will get loads of advice.
I have an A3 2.00 TDI DSG, personally you have to test drive the dsg, some people love it, some hate it. But it is basically an automatic with some paddles for going up and down the gears, i never use them. I would choose a manual every day, just the Mrs wanted an auto...