It would be advisable not to mix and match suspension as the tolerence and setting for the complete set has been researched on. I have been using HWL coil-over suspension for my Laser TX3 for just over 10 months and theyre worth the money... Mine's a custom made set running 6kg front and 4kg back... They tend to get soft after a while, but now theyre perfect... Just entered the last Proton SSO4.5 and the shockers really lived up to it, well that and alignment set-up and ride height adjustment...
Price for the HWL's start from RM1350 all the way to RM3000 for a fully custom made set complete with damping adjust, ride height and spring loading seperate... My advise is to get Tokiko or Kayaba coupled with Eibach springs for the ultimate everyday driving pleasure...
If youre planning to go for Autocross or Track on the weekends then the HWL's are recommended... Other brands include Hotbits, TiTAN and GAB... All good, but it all depends on what youre looking for and your budget... Battousai is running TiTAN's on his Interplay and some of the fellas here are running RG's, GAB's... maybe they can lend a hand about youre queries...
CHEERS