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I use normal however cannot comment on the difference as never used grooved.
Depending on your pads (I run DS1.11 and find them fine and for the price they are perfect) @Vioar
On the rears I got some eicher discs from ebay and had bearings pressed in, think they were £40 a set then. Front CL RC5+ and brembo HC discs. Fluid, don't have much experience but currently have typ200.