Yes, u can add amplifiers or any upgraded speakers. As there is no RCA output from the original HU, u need a hi/lo converter (cheap but lousy SQ). A better option is to get a processor and connect via the speaker input. Some of the high quality ones are the JL Audio Clean Sweep, Rockford Fosgate 360, Alpine H701 etc. Do some google search on these devices to understand more on what they do.

Amp and subwoofers depends on your budget and preference (SQ or SPL). My experience told me a budget of RM2K could only get you some mediocre new subwoofer system. Even a new Kenwood or Sony subwoofer system (amp+SW) will cost u approx. RM1K++ . Brothers or any ayam brands will be cheaper lah but is that what u want in your new car????

Everybody has different expectations. By the way, since USB connectivity is a must, then I presume he can accept compressed music quality (SQ not the priority). Hence, I don't think it will make too much difference with other HU out there with the function. The Alpine 9886, 9887 (less than RM1300) are value for money decks as it comes with hell lots of function for tuning.

If SQ matters the most, then pure deck is the way to go (but devoid of all the "excitements", connectivity and functions). But then, RM2k is just too little for the big ambition.

Wow, Zenn how u know the feeling of minum beer??? Nanti kena sebat tau.

Don't get from Brothers lah. They are well-known to for lousy installation service but price is ok for Sony & Kenwood (although not the cheapest). As for your budget set-up, you can try Auto Genesis (Seri Kembangan near South City Plaza). Price is very reasonable for Pioneer, Eclipse and Alpine HU.

I don't think you really need to go until 4 subwoofers. Just get one 15" subwoofer powered with at least 800w RMS and one pair of component speakers (power by at least 2x400W RMS) for the front. As for the rear, just leave the OEM speakers to be powered by the HU (for the surround sound). Make sure get good quality amplifiers (power is most important here). By the way, don't forget to get a set of comp. speakers with very good mid bass and able to stand the power as you need them to complement your SW.

As for your preferred set up ala clubbing style, you may want to try Agako Extreme series. They give you the best power per RM you pay although not clean. Go to your favourite accessories shop to try them out. All seasoned ICErs know that Agako is synonymous with SPL. Lightning Audio and Rockford Fosgate are popular too if u have a more generous budget.

You can try the Pioneer PRS or the current Alpine Type-R. But then, the Pioneer PRS is more than 2 times the price of the Alpine Type-R.

Just a 'decent' comp set would have already cost you more than RM500. Unless you are ready to accept cap ayam stuffs or used sets.

You can try Sony speakers but they may not meet your definition of decent (depending on your expectation). Don't be fooled by the name Sony. Sony TVs but ICE products

Personally owned the Alpine 9887 before. With Imprint settings, what you get is a lot of details but trust me, you may find that the bass is severely lacking. Perhaps that is what the Alpine sound engineers interpret as sound quality As for the Eclipse 7100, it sounded good to my ears. Nevertheless, hate the flimsy volume button and less than perfect CD eject mechanism.

The P80RSII is another good option with lots of tuning capability (more than Eclipse 7100). Using it in my the other car. Chosen the P80 instead of the 7100 as the faceplate built quality is so much better than the 7100. But, what u get is only black and white display.

If u don't mind 2nd hand, can try the Alpine 9835 or Alpine 7998 or even Alpine 9855. But non of the HU beats a pure deck (like the Mcintosh series, Alpine F1 or even the Clarion HX series. Well, there are many more choices out there- depending how hard core u want to go and of course the depth of your pocket too). No point of getting a very good HU but dismayed by the other less than perfect equipments such as the speakers. I hope u get what I meant.

I will recommend the D2 instead of the D1 if you are a newbie and have the budget for it. With a simple built-in processor, u will be able to tune them conveniently instead have to fiddle around with various tuning components or a full-fledge processor.

Well, sound characteristics and preference are very personal. But as far as I am concern, I will choose the D2 without much doubt due to its superiority in producing details (which is very important with my favourite music genre i.e. smooth jazz, instrumentals and R&B). If you prefers vocal more than anything else, perhaps the D1 could be a good bet. But I will take a Mcintosh HU at anytime if a pure deck is what I am looking for. Anyway, the D1 has been phased out years ago and u might have problems in sourcing for parts.

Well, at least the ICE industry is going to thrive with the existence of more of this group of people.

Wah supersound and pisces tak cukup cukup lagi ke? I just want to say it takes 2 hands to make a sound. By the way, just let the forummers judge who's right and who's the trouble maker. But engaging in unconstructive arguments is a good way to make you feel young again. Don't u think so?