with budget 5k may i get a good SQ system for my car?

Sifu Uncle Soong has answered.

wa, so humble of u. ur retirement means sold all ur stuffs or not changing anymore?

cannot retire yet. now got brax matrix amp to upgrade your GE 

ICErs generally look for the equipment that gives the best sound up to their budget. If you go for price/performance you should just stick with stock. Cause stock is already paid, therefore its theoretically rm0, so price/performance will be through the roof.

Serious/audiophile ICE is like F1 racing. Get the best performing equipment with your budget at hand. Then tune and tune again to maximise the equipment that you have.

^Well, if you are not bafukie and is bufukie, you maybe right. But then you are under the same gang, your statement is same as mine, baseless, if thaat's the thing you want to call for.
Well, if you want to defend your friend, go ahead. Already known that you want to help your gang to do free ads here.
On the side note, I guess I've gone a little bit too far by attacking some acc shops and their gang that doing free ads here(especially that coward bafukie and another coward mod from mycarhifi). I'm sorry for that.
Now to all the cowards that always doing personal attacks on me and wanted to help their boss to do business on forums, what can you do to guarantee and safeguard newbies investments? Will you buy back their items if any problem arise?

Like liquiddog's question, for ckmoy, since you change your statement like changing underwear, will you buy them back if Howie do sell fake speakers?