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My brother has a 1990 Coupe Quattro with an RS2 (real) engine in it. Done by 2Bennett here in California. I am not questioning their mechanical ability, which is top notch, but my brother bought a Porsche Turbo because his Audi was always in the shop and my Porsche is not. So based on a pretty small sample, I am going to guess that any Porsche will be a more reliable DD.
I believe he is still on the original clutch and rotors if I am not mistaken. If you do some searching you will see some posts on his mileage and how he has maintained it so well.
Again, from your requirements, you may wanna look at a 996tt, esp re creature comforts as the 993 interior is right out of the 70s. jmo of course, I still think the 993tt is the best tt they ever made.