amp or head first?
 

i would like to upgrade the audio
got couple of ideas, but one "school" says add an amp, use the original sys, i'm done
another says just throw in a deck, it gonna drive all the stuffs
i personally think that i need to upgrade the amp anyway later on if i upgrade things kinda thoroughly, no matter whether the new head can drive the speakers to an acceptable level right now, therefore, i should work on the amp first, right? (i actaully found the instruction to change my factory head w/a mp3 input wire, therefore, i can save couple of bucks on head becoz an amp will push all stuffs to a pretty acceptable condition, is it right? i'm still a student, skinny:ohwell:)

which way should i go? thanks for ur time, guys

Really depends what you have for a stock head-unit. A few factory units come with RCA pre-outs for use with an external amplifier. If your stock unit is capable of easily getting a signal to the amp without the need for a Line Out Converter or some other processor, then that deck will be okay.
If you haven't upgraded your front speakers, at least, then there's no need for an amp as most factory speakers won't handle much amplification.

I'd suggest a head-unit first. Then, later down the road, a 2 or 4 channel amp, and some front component speakers (mids and tweeters are separate). There are quite a few 4 channel amps with which you can bridge the rear channels to supply power for a subwoofer.

The guys that are going to help you the most are going to need to know what your system currently consists of.

HU first amps after. using a stock HU with an amp using high lvl input just sux. bass will still suck through the speakers when you bring the volume up.

stock deck is to limited to do anything aftermarket wize.

Do you start with a good clean signal. or do you amplifiy distortion first and worry about signal quality later?

That there should give you your difinitive answer

Head unit first is what this man is saying

thank you all guys
so helpful is this forum!
learn fr u guys later!!!