having experienced grooved and dimpled discs,on a previous car.
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and plain discs and uprated pads on arev3 turbo,
i would go for the plain disc setup every time.
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i had problems with rust forming in the grooves and dimples
which with the pads having a flat surface,did not get rid of.
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i know rust forms on the plain discs,but after a few minutes driving and applying the brakes,it soon goes.
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also, only my opinion but standard discs,with good pads
are perfectly adequate unless you are running massive power.
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paul.
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