fuh, many pages, didnt read. so if i repeat, i apologize. but i wanna share with u my experience with coilovers. i've used a few diff types..
1. gab HA - 6kg/4kg spring rate - not too bad, its in between comfort and performance. more to comfort la honestly, but its only hi/low so my preference was limited.
2. tein super street 6kg/3kg - this is the worst pair of coilovers among my choice. no doubt its tein but its really for street driving. i wanted something which can make my balls hit each other when i dial HARD, and super street did not give me that. i installed it, came out of the workshop (there were some crub/bumps outside the workshop) after i went over it, i drove right back in to remove. total time duration of the super street on my car - < 5mins.
3. BC Racing. - 10kg/8kg - best among the choices i've made. still with them. 32 step adjustable. hard really hard (my balls hits each other, my boobs bounce when i go over yellow lines) and soft really soft (tein super street style). no regrets with these babies... i highly recommend...!