Can anyone tell me which coilover can provide more comfortable ride & softer, and also which is cheaper?

is koni adjustable in term of soft/hard? and it should have the similar feel with the original suspension, right?

If you want something really good, that does not require tweaking and makes the S4 compete with the M3 - Vogtland Coilovers is what you want.<ul><li><a href="http://www.startupracing.com/B5ProductsSuspension.htm">Linkie</a></li></ul>

KW Coilovers vs H&amp;R Coilovers H&amp;R Coilover adjusters get rusty and u'll have problems within 2 yrs KW Coilovers don't rust and the ride it sporty and smooth....