I'm looking to buy an '03-'05 A4 quattro with a 1.8T engine. The 1.8T version seems a bit underpowered. I'm looking for feedback about ways to get a little more acceleration without having to move up to the 3.0. A sales rep suggested the Neuspeed ECU chip, and said it wouldn't void the warranty. Others tell me that it WILL void the warranty. Anybody have any experience with ECU chips, Neuspeed or otherwise? What about putting an intercooler on the turbo?