With the brackets from AKS tuning you can run either 345mm R32/ S3 discs or the 340mm TTS discs (which are about 1kg lighter each than the S3 ones). I have the TTRS calipers with brackets and MTEC drilled/ grooved TTS discs and they're phenomenal.
Brackets + discs + delivery cost me £400 and new TTRS discs cost about the same but with this kit the replacement discs cost £150 instead of £400 and you'll get money back on the brackets if you sell the kit.