Questions for 4 you mean I should have a stiller rear bar than front bar? And 5 what does having a higher rear spring frequency do exactly?1. the conti extreme contact sports which came out this past year, are better than the old michelin pss by far. you would need to compare the conti ecs to the new michelin ps4s but they dont come in smaller sizes. i've tested the conti ecs on a 550hp rwd car at autocross in near freezing temps in the rain, they're magical.
2. ebc greens dust heavily and wear quickly, but they are inexpensive. i've driven on hawk dtc30,60, blues, blacks, hps, hp+ , ebc green yellow red, porterfield r4s, gloc r6, r8, r10, carbotech bobcats, ax6, xp10, xp12, a bunch of wilwood compounds
4. dunno why you think im saying to run more negative rear, you should run more negative front camber
5. the si spring is no lower than the non si rear spring it does however have a higher spring rate to bring the rear spring frequency up. if you havent driven a fwd car with a lot of rear frequency, then you should try it before you comment on it.