Aragorn, I absolutely agree with you that for the track, suspension is more important than power.
That's why instead of throwing a BAT on, I started with suspension and brakes. I still have a lot to do, especially with the rear. Last year I have run out of time because of more issues with the car than expected, but this year I am planning to hit the track as often as cash and free time let's me. It will show me where TQS needs more work, but I can tell you already that rear suspension bushes and brakes are pretty shocking, and are first on the to do list.
My first mod when it comes to power, will be forged engine. With 140k miles on it, I don't want to risk anything more than stock power.
The question I am asking now though, not looking at power, would you prefer a 1.8t or a 2.7tt for your track car?
Taking in to account weight, power delivery, cost of maintenance etc.
I think I am still closer to keeping 1.8t because it is cheaper and A4 is a nose heavy car already.