I have a stage 3 ST with the normal full turbo back exhaust with decat, Airtech Cooler, Open Induction and a pumabuild remap and its very very quick compared to a standard car and has to be pushing close to the magic 300bhp, I have a scooby thats 380bhp and its certainly a lot more entertaining to drive than the scooby.
I have had the uprated RS clutch even though my standard clutch was holding up to the mods its better to be safe than sorry no good have the power if the clutch wont let you use it.
Also had the Eibachs fitted and the ARB's uprated which has a dramatic effect on how the car handles.
The noise it makes its just soooo addictive and scarin the shit outta the old granny when the thing bangs between gear changes is amusing but very childish...lol