I had Falken Azenis Sports, the stickiest road tire so far for me. Very noisy and the tread pattern doesn't lend itself to straight line stability or any hint of all weather capability, but on dry pavement-WOWIE ZOWIE! I believe these are the tires that won there class in auto x at the Nationals. I was using them on an 02 wrx with size 225-45-17, but I'm sure they would improve many other cars too like the focus.
Old fat grandpa guy with a nice pretty wife that lets him have a STi.