daram i don't think anyone knows enough about the SR20VET to judge its refinement cos it ONLY powered the X-Trail GT and is not a commonly found motor... it may be just a SR20VE with a big turbo slapped on but it doesn't make things any simpler... fuel consumption will be disastrous and so will regular maintenance such as CVT oil etc... the 2.5L x-trails are superb and that sort of power is more than enough for an SUV of that size...