THIS IS WHAT YOU WANT if on a budget ;-)
You will want to buy the parts off the net, 1/2 the price then stores...
Headunit - kenwoods are nice, the one I have costs less than $200
Front - Pioneers from walmart $55, sounds cheap but they'll get you what you want!
Rear - Pioneers from walmart $65, same thing, cheap and nice still
Subs - Millions of brands, choose yours! I have 2 Phoenix Gold Tantrum 12's running 300rms each and they'll still bump louder than any 1000w subs I've seen. Not exadurating, it's not always about the wattage...$200-300
Sub Amp - Once again million of brands, but you really cannot compare the value/price of phoenix golds, they know how to make a good amp ;-) $300
This will get you where you want to go for under $1k, and this is exactly what I did for my first system and it was awesome, if you want to go the distance tho, the next upgrades will be...
Dynomat - a layer that goes in your trunk that repels the sounds waves off so the waves stay in the car and go towards you, also cuts down on rattle.$80
New sub box - I had a CLOSED/SEALED subbox at first, it was excellent sounding and was real "punchy." I just bought a powerbox custom made which is vented and has 14 angled pieces of wood on the inside to guide the sounds waves to make the bass BUMP THE HECK OUT OF MY TRUNK LID lol $350
4ch amp - This cuts the bass out of the midrange speakers so that the bass does not distort the sound quality at higher sound levels, it allows the subs to bump, and the midrange to give you beautiful music. I bought a $600 one, but so damn worth it.
IT's all upto you as to how much you want to spend, I started light, then moved on to the big boys. I can honestly say I'm done with the system. All I want to do now is make it look pretty, cuz right now it just looks cluttered
If any questions are needed answered or just want to talk audio, I'm all up for it just send me a PM. I wouldn't mind personally helping you along the way to your new system, I really enjoy picking it all out
Zac