Re: r1 concepts
I got the slotted ones which seem good - they probably eat the pads a bit quicker than the solid rotors but I'm okay with that for the front discs (I got the R1 solids on the back tho).
I didn't go with drilled & slotted due to the numerous reports of cracking from numerous guys on here and other sites. Might want to look into that a bit further...
"Even though I walk through the valley of the shadow of rice, I will fear no turbo for thou torque art with me. Thy rods and crankshaft, they comfort me."