I have a 00 TT myself and have been speaking to people about adding Nitrous instead of turbo upgrades ie. Boost Controller, Chip. From someone with extensive aftermarket performance part upgrades (Running an Oldsmobile Grand National with aftermarket turbo putting out 650 HP at the wheels) he mentioned that once you start running nitrous you have to start worrying about the lifespan of the parts concerened (Transmission, Valves, cylinders) he said that while nitrous is affordable and can bring you great gains in HP and tourque, your going to end up sinking more money into repairing the things that go wrong once you start running nitrous. This really made sense to me and hopefully you can find some more reasons to NOT go with Nitrous and work with the aftermarket parts that are available with minimal risk. Good Luck.