Welcome to the forum Iain :)
You'll find the members on here are a friendly and helpful bunch :)
Yes it is a wolf in sheep's clothing and yes you can increase the power. A remap will get you.those extra horses :) various companies offer this service and the map should be tailored to your car as no to RSQ3 will be the same due to age, mileage, service history and even to the way it's been driven.
If you're looking at approved used from Audi then you should be seeing cars that are some of the best out there (in theory) in terms of service history mileage and condition :)
Hope I've helped :)
Cheers
Steve