I'm currently running Yoko's AVS dBS2 (226/60-15) on mine. Have about 22k (including 3 track weekends) on them. Very satisfied and will probably get another set in about another 15k. Tire rack usually sells these for around $70ea. Had the Mich pilots on the wife's e39 528 and was not impressed at all- currently running some Kuhmo's on the car- can't remember the model (711's ?), but seem better than the Mich's and much cheaper.
Chip
'92 535i 5sp
EAT chip, Sachs kit, RRT sport control and upper thrust arms, SS brakelines, Camber plates, Subframe inserts, 3.64 Diff, M5 (3.6L) calipers.
'87 325iS