Hi Bros. Need to get some advises from everyone here. I'm having an p.alza, but found that the original sound system is really bad compare to proton. So, i'm thinking that whether if i add the component speaker set, will it be an option for a better outcome. Really appreciated everyone advices. Thanks.

Definitely....

I think the most important part is changing the HU, but it will void your electrical warranty.

Changing front spk to aftermarket component will be giving you a big jump over the sound. It will make your audio sound more detail and the most important point is staging and positioning will be improve, sooooo you no need to look down and search where the singer is hiding.