Any suggestions for a hot setup on sway bars (a/k/a roll bars) for a 1998 M-3 will be appreciated. I have seen a variety of sizes and manufacturers (below). Any guidance about which setup and/or manufacturer would work best for driver school/track conditions will be appreciated. Thanks.

Model Front Sway Bar Rear Sway Bar Front Stiffness Rear Stiffness
Stock '96-99 M3 0.905 (23mm) 0.787 (20mm) 0 0
UUC 1.0" (25.4mm) 0.9375" (23.8mm) 49% 101%
Racing Dynam 1.0625" (26.98mm) 0.875" (22.225mm) 90% 52%
Dinan 0.875" (22.225mm) 0.875" (22.225mm) -13% 52%