UKPassats

Evening all. I'm due to replace discs and pads on my 03 4motion tdi estate and wondered what was the current preference? I don't want to spend a fortune but don't want poo. There are well priced brembo discs on eBay but again, don't know what's good and what to avoid. Also there seems to be a lot of different size options even when you put your reg in the searches....
Can someone point me in the right direction?!