I agree with Rob, I've done some runs on my T1-Rs and they are superb.
T1-Rs are aboth web and dry track tyres so get the extra benefit of your trackday not being ruined case your on semi slicks..
T!-R's are road tyres
R888's are track day tyres and just happen to be road legal.
R888's for track, or proper slicks. you will kick proverbial arse with slicks on in the dry