if you have budget of say RM5.5k...

the list your friend gave you is like "alang-alang"... personally, i wont go for 9887, i wont go for Audison, unless they are sold dirt cheap, then i MIGHT consider them...

I suggest you go on stage by stage... sort off like below.
1. find a shop/sifu/foreman, who is well exposed to modify your door panel rigidly(Important keyword, rigidity)...
2. Go and have a listen to actual proper setup. choose your front component based on what you like...
3. Not many people like audison characteristics, from your preference, i suggest you look for brands like RF, TRU, Focal. something dynamic characteristics. 
4. Choose your sub and sub amp based on the power(RMS and no. of coils), box size and SQ you want. go for flat subs if you want to.

Few pointers you have to take note off... If you wan to keep your stock HU and go active setup at the same time:
1. You can get a JBL MS8 as your audio system processor. keeping your stock HU.
2. You can also get amps that has "hi-input connections" with bandpass-able xover built in.
3. Ignore this part if you dun plan to go active...

here is some personal recommendations with price estimations:
1. Focal Solid 4 - RM1800
2. Morel Tempo 6 - RM1200
3. Door Mods - RM1000
4. RF P1/P2/P3(couldnt remember exactly which one is this price) with custom made box - RM1000
5. Cabling/fuse/labour - RM500

all the parts above is quote new... not second hand... if you dont mind going 2nd hand... then there is more openings for you.

and the previous chap ayam things... you can try to sell online... but dun expect to sell it at a good price...

cheers and good luck...