Acidutzul's car is also a diesel (140bhp 8v)
My current setup is 26/24 set to hard/hard. I've always had this setup and I wouldn't want to change it. I use my car as daily drive (and in Romania the roads are pretty bad) and trackday car. Can't really imagine driving my car with 28/28 sways on track. It sometimes oversteers with the current setup (not lift off oversteer) so I doubt 28/28 will work for my car.
BUT the GTI is another story. The engine is heavier and it has a different weight distribution. My car should be about as heavy as a GTI on the front axle (the GTI engine is heavier but has a 10 degrees incline towards the back while TSI engine have 20 degrees incline towards the front). So, my point is: if oversteers are a walk in the park for you (even at 100+mph) then go for 28/28. If not, use a kit: 28/24 or 26/22 (I mentioned H&R because they are of very high quality and maintenance free).