I haven't tried the CF1 but I am probably going to fit a set of Toyo Proxes T1Rs to my S2, they have a noce pattern get some good reviews even if over priced due to popularity. Just waiting for a price from a local fitter before committing to them, one price was arounf £433 for all four 255/40/17 & 225/45/17. I can get them for around £300 from Camskill but then have to pay for fitting and balancing so if I can get them for similar all fitted I will. Good site for tyre reviews is
http://www.tyrereviews.co.uk .