I wouldn't also suggest a full-setup but rather to upgrade bit-by-bit so that you can fully realize the difference each upgrade takes. Also, sound is subjective.. so your "decent" quality is different from my perspective of decent. Thing with sound quality is that people's standard is that on what they have heard... it's like buying a TV, a 32-inch might seem big now.. but once you've tasted an 80-incher Plasma, naliliitan ka na sa 32".
1) First I would do is to to swap the stock speakers immediately. Alot of MS owners do this straight out of the CASA due to the abysmal stock speakers I'm told start with the front speakers (where you're usually the driver) and leave the back.. stock. At the same time, deaden the doors so that you maximize your midbass potential. As a side advantage, you'll feel a solid "thunk" everytime you close the door (kinda like those premium cars like Mercs) at the expense of additional weight (hence gas)
2) Throw in an amplifier
3) Throw in a subwoofer
This is a standard procedure in car audio upgrading for most people. If you plan on upgrading everything all in one go, feel free. But if you're griped with financials, follow these steps. Personally if I were serious with car audio, I would invest in a good head unit. But 95% of Monty owners wouldn't want replacing their stock head unit so I didn't mention it here anymore.
You need not compromise on space really but you'd have to use some creative placing on the subwoofer. "Iba ba kung may sub?", for most people yes. But given a good speaker set, you don't really need to. I've heard systems that sound like there's a subwoofer but in fact there isn't. Then again, these are a hundred grand speakers we're talking about. Personally, yes. Get a subwoofer since it adds that "oomph" in the low-end.. and as with 80% of the population, we all love bass.
Last edited by jhnkvn; May 24th, 2012 at 07:49 PM.