I previously had a Golf Mk4 TDI 130bhp and loved it so much i kept it for 8 years which is probably what i will do with the Audi. That's why i went with the new Audi 150 tdi even though work is only ten mins away. I,ve never achieved decent mpg from a petrol car but looking at what the cod's are doing mpg its tempting. I'm currently driving a Nissan Micra 1.0 ltr i can't even get decent mpg out of that got it to use till my Audi arrives. I think it's the fact that petrol cars warm up quicker which is making me ponder the cod as the Golf took ages to warm up on winter mornings.
if you liked the 130bhp, no doubt you will love the 150 bhp unit.
Unsure if a 10 minute drive will get the diesels to up to operating temperature. Think it used to take mine around 15 mins to reach 90c. For such a short journey, I am assuming you do more personal mileage otherwise you will encounter DPF regen issues, something which does not occur in older diesels.