Most important question you wanna ask yourself:
Is price a factor? Is reliability a factor? How good a handling do you want ur car to be? harsh? soft?
1) I just want a simple upgrade with good price n better handling(not the best)
Then get tein. super street. at least made in japan, so their reliability should be fine. this set is not harsh on the roads.
TRD yellow shocks. Best reliabilty there is!!! but exp at rm3k for just the 4 shocks only new
GAB I am not sure. Check around for their reliability
2) I want much better n sporty suspension with a premium price.
hks suspension around rm7k new. fully adjustable n settable damper settings. Greddy/trust is the same as hks. around 7k new
good reviews, good handling, good reliability...one of the best names in the business. wat more u need? ask from vision sunway.
hks LS+ comfort with sporty handling. shouldnt be a harsh ride
hks hipermax 3. sporty handling. could be a harsh ride
personally i wouldnt wanna buy used as u dun know when they will expire.
its no easy thing, so take ur time.
and please, dun buy from chop shops unless u absolutely 100% of their quality
good luck
disclosure:
I used the following before:
1)tein superstreet, but due to my own personal opinions on handling...I find it too soft n too bouncy for me.
2) TRD yellow shocks. Still love these
3) TRD sportivos(blue). soft n comfy not bad. blown mine while speeding over a bump a high speed