I've got a Garrett gtx2867r. Dyno tuned and 3" exhaust. I put down around 285whp, and the torque and power curves are really smooth.
It's a good amount of power. If it was less, I'd want more, and if it was more I'd shit myself at WOT. Already get to 100kmh(60mph) at the top of 2nd gear (or very close) in a bloody short amount of time :P
Honestly it feels like the right amount of juice.